Not a very scientific justification, but I only use 91, not because it needs it, but because that's the only grade I can get without ethanol, the addition of which was a crappy idea in the first place. IMHO.
With the average TC, you are living with about 24 sq. ft. of actual floor space, without a really comfortable place to sit. If that doesn't bother you, you're in business. With a popup, you have to drop the top to drive anywhere. That gets old qui...
I'm not sure what the failure mode of a rim looks like, but I'd rather watch it on You Tube than ride it out! Where were you able to find that wheel rating?
If you plan to leave the camper on all the time, the heavier stock springs sound like the way to go. Are your air bags connected to each other with an airline? If they are, it will work against you on sway. They need to be separately valved. Also,...
We are the third owners of our newly purchased 1993 Sunline 951. Last owner was an RV tech, who stripped it down to the frame, repaired whatever damage was there, eliminated the front window, re-sided with filon and re-roofed it with that rubber stuf...