Our old '73 C10 used to haul a lot of steel, but it sagged quite a bit. I don't know what the actual capacity of the axle / wheels are on the truck, but like the others have said the biggest 5th's are going to have the problems, not the smaller ones. It would be terrible if something on your truck broke which damaged the 5th you were carrying. I don't know how large your CG is, but perhaps you could design a few sites to handle the large rigs, leaving the more difficult to maneuver to the smaller units?
I have a 35' 5th and while not the largest, I stayed at a CG which had sites large enough to handle 45' trailers. They put me in a spot which I barely fit into. I am very experienced with backing and it took 20 minutes for me to get in there. To get out, I had to ask the neighboring campers to move their cars the night before. Needless to say, I will not be going back there again, just something to consider.
The BHLT is very nice. My 14 year old daughter is 5'6" and fits fine in the loft. I am 6'1 and have difficulty getting up there and its quite tight for me. I do love the rear bedroom area, and it could easily be converted to a den once the kids stop wanting to go. Both bunks fold up, making it an excellent storage area for things like Bikes. The ceiling is very high through out the entire coach except in the master bedroom where I have to bend over.
All in all, I love the camper, but if my youngest (11) was 17 or so I would be looking for a front living room model.
After a very trying trip we finally made it home only for the truck to break down before being able to park the camper. If any one is around the area who can help back the camper up the driveway (150 feet) that would be awesome! If you don't have your hitch installed, as long as you have universal rails we can use mine. Thanks!
I don't have a Cougar, but I had a second A/C installed in my Jayco. In my case, everything was already set for the A/C installation, duct work, electrical wiring, and thermostat wire so I had a choice. I went the ducted route with this as my logic. I can use the dump feature in the A/C to cool the room directly, getting the best of the non-ducted. I can run BOTH A/C's which doubles the cooling in the entire coach, and finally I can run one at a time. The bedroom can run while we're watching TV, making it far quieter, and the main can run when sleeping.
If your Cougar is all set for ducted, that may be a better option for you, if getting to the ducts would be difficult / impossible then non-ducted is the only choice.
Also check the tank vents on the roof to be sure that they are clear of debris. In order for the "good" bacteria to work they need oxygen. A plugged vent will prevent the tank from breathing which contributes to the smell.
If you have a tank flush, maybe fill the tank several times and flush well. If you don't have a tank flush try one of those wand things to remove as much "stuck on" material that you can.
I added a second a/c early this year and specifically for Myrtle Beach. I figured that it's easier hear from the DW that I wasted money than to hear from the DW that I should have gotten it. I definitely feel better about going knowing that there's now 2 13.5K units ready to cool us down. Additionally, it's nice to be able to turn the front A/C on while in the living area to hear the TV, then at night turn on the living A/C and not hear it in the bedroom.
I went through a similar exercise. Going to Myrtle Beach in a week or so and the heat was a concern for me and my 35' 5th with a single 13.5K A/C. I deep tinted the windows, installed vent covers so I can travel with vents open and finally installed a second 13.5K A/C. There are all sorts of tricks involving fans, keeping everything shut and all, but for me, at the end of the day having 2 A/C's will allow me to enjoy camping even with higher outside temperatures. Mine already has 50A service, so running both with a microwave and all is not an issue.