There is a limit at which it becomes a hazard, a small leak is not, it is when the whole tank ends on the floor, then there is a problem.
Out houses have existed for a very long time, these new regulations come from the minds of desk drivers that have nothing better to do to keep their job, I spent summers at my uncles farm cow, pig, chicken poo was shoveled on one side of the barn, same side the toilet holes that overhung the barn, straight drop in to the manure pile, then in the fall we would place all that in a manure spreader and fertilize the fields, no one ever got sick, it just smelled.
Any black tanks spill is considered a biological hazard, and if they put any chemicals to deodorize or lye, it becomes a chemical-biological hazardous spill, subject to fines and all sort of ordinances.
Since it is only the wife and I, the hazard is not that bad, it is still handled correctly, I make sure that my equipment and connections are leak proof and they will stay put.
We were in Arizona in Benson, rental unit several spaces from us early morning guy comes out with apron, yellow gloves as in household, squats in front of drain pulls handle with gusto, looses balance, rocks back lands on ass, hose loses connection, brown liquid gushes out and proceeds to spay all over him and adjacent ground, I really felt sorry for him he went around the front of the RV and we left soon after.
My wife complained about the RV park perfume, she did not see it, I handled emergency vehicles that were used to clean sewers and never had trouble, I only use the gloves like the ones that servers use to rinse the hose, then wash hands.
Some people go overboard, it is all bio degradable, if this is dumped in a methane generator all biogens will be killed, that is what the black tank is a methane generator.
Get three good paint buckets with lids, strap them to rear bumper.
First bucket has water with some laundry detergent, second and third buckets have clean water.
Pace cloths in first bucket and drive to destination.
At first stop, remove cloths from first bucket and place in third bucket.
At second stop, remove cloths from second bucket and place in third bucket.
At last stop, "campground" remove cloths from third bucket and ring out and then hang cloths on rear ladder rungs to dry.
Other than the buckets you have most of what you need to do laundry, if your shower is deep enough, you already have everything needed, you just have to change the water and you can hang the clothes on the bar above.
Use only the fans on the top vent, that will be enough to pull hot air out, the other fans will not really do much, I have four fans on the top and have four separate switches to control which and how many fans are going to run and we have been in desert heat of 120 and the fridge was cooold.
If the RV has the feature there will be a push button on the dash board where it can be pressed at the same time as the key is being turned to start the engine, check the engine compartment, there will be another thick cable with a big fuse going to the positive on the battery the other red cable goes to the starter motor.
Tourist trap areas are normally safe, the bad elements normally do not bother with the area since there tends to be more law enforcement and more surveillance, and that is the last thing they want, the bad elements tend to come out of the woodwork at night.
Crime is present in every major town, village, city, and being a tourist carries some risk, whether it be in Canada the U.S.A., Mexico, England, Germany, the only exception are places like Syria, Afghanistan and Yemen, only a complete idiot would go as a tourist to this areas.
If you do not like leaving your comfort zone, that is your prerogative, there are those of us that like to travel and see other places and cultures or just enjoy a cerveza in a warm spot it definitely beats shoveling snow.
O.K. Chicago, Iguala, Washinton DC, Reynosa, Oakland, Acapulco, Vancouver Los Angeles, Montreal, Monterrey, etc, etc.
We get shot in the Mall's and the theaters and our kids get shot in school, or just walking home, pretty poor showing of being a "first world" we are no better, so the best is not to throw to many stones, there is to much glass in this house.
The ladrones (thieves) can't compete with you know who, so they moved to the U.S.A. that way they can steal in Dollars because the Peso is not worth much at the Monte de Piedad (pawn house).
Unless you go looking for trouble, you will be safe any where even in the good old U.S.A.
Do not let the talking heads scare you to much, only believe 4 to 5% of what they say, any where in the world.
Call several tire stores and ask them how much it will cost for one tire, with new stem valve and balance and if they have tire disposal fees.
Give them the number on the side wall (Example Goodyear LT 225/75 R16) and let them know that you want the tires new not the ones that have been sitting in the tire rack for some time, there is a manufacturing date, numbers stamped on the side wall, (05 08) first number is the week in which the tire was made the second is the year of manufacturing, these numbers are from my rig, I am going to replace all 7 tires next month.
A significant number of inland paisanos (natives) migrate to the coast for Semana Santa, the roads going East to West and vicesevrse will be congested at the beginning and end of the "vacation", some roads going North and South will also see an increased volume of traffic, be very careful on the roads and have patience.
You can drive a small distance at a reduced speed until you can get to a safe place and then change the bad tire, if there is a blow out you will hear the bang and you will hear the tire ripping apart, the RV will also be lower on that side.
Your RV should have a spare tire and you should be capable of changing it on the road, get a good 3 foot braker bar with an extension and the correct deep socket, a good strong bottle jack and a jack stand and a couple of wheel chocks.
Always chock one opposite tire and use the jack stand, safety first, also take some boards to set the bottle jack and the stand, and set the parking brake.
Should a tire blow, change it and when you reach the tire store have the mechanic check the tire next to the blown one by removing it and inspecting the side walls visually, if OK have them remount and re balance.
Always check the tire pressure on all tires, there are tire chucks that are longer and are specific for dually's, proper inflation is very important.
I found that most motor-homes have the turn signals only on the rear and none on the side of the unit, making the turn signals all but invisible to the drivers next to you, I installed amber turn signals just in front of the rear wheel well and high enough so that they are visible to the person driving just behind and to the side, now they clearly see that I intend to merge into the lane.
I am also going to add amber turn signals under the mirror arms, that way they are more visible and indicate my intentions to the other drivers.
As stated before, wider turns, no baking up, do not enter a place that you can not get out off, look for gas stations that have ample space to maneuver in and out and around the pump islands.
Check the tow systems of your camp neighbors with her and see witch one is easier for her rather than one that is too complicated, one that you can also help her connect and disconnect.