We have taken our Newfoundland on a couple of cross-country trips, and he loves the adventure, almost as much as the kids do!
On the few occasions where we have had to leave him alone in the RV, I've left the genset running and the AC running.
I don't worry about leaving the windows open when the dog is staying in the RV, since he pretty much scares away anybody that even looks in the windows. If he's crated, we cover all the windows to prevent looking in, but his bark still gets people's attention. That pretty much fixes the security concerns, for us anyway.
I too worry about the genset failing, but even in direct sun in Kansas summer time, the RV didn't heat up inside any quicker than the stick house does. I have no idea if our RV has more insulation than others, but it holds the heat just fine in sub-zero weather as well.
We've had this Newf on a 6K mile trip and an 11K mile trip, and never had a problem. Ok, there was this one time, but it wasn't related to anything we're talking about now. :)
Yeah, enblethen, when I bought them, I saw 3, 5 and 10 pound from SouthCo, and the SouthCo were under half the price of the RV Designer (again, at Amazon).
And, looking at the RV Designer link you gave, I mostly just needed part H317.
Oh well, the most important aspect of the project was successful (DW is happy).
The cabinet locks on several enclosures have broken over the years, and after casually digging I finally found what I thought were exact replacements.
I got the SC-4320 catch from Amazon.
Installing them just now, I discovered that they aren't EXACT replacements for what I had, they have minor differences that when combined with existing holes in MDF, made the install a little more challenging than I had hoped.
As you can see in these two photos, the new catches have a wider footprint and are just a little taller than the old ones:
The catch part is also almost identical, with the non-adjustable holes being just slightly towards the back:
All-in-all, a rather easy fix, kinda kicking myself for putting it off for more than a year!