As an add on to your question about off roading a travel trailer:
I had a 23ft Nomad (skyline) TT and took it off road often to support our family Off Road Race Team. The TT came with the axles flipped so it had plenty of clearance. Most of the roads we traveled were hard pack dirt with some washboard and dips. I pulled it with a 4X4 Chevy 2500 and never got stuck even when parking away from the road. Once in awhile stuff would fall out of a cabinet eventhough the latches needed to be squeezed to open a door. No other damage.
I now have a 38ft 5th wheel and only have a two wheel drive truck. I have taken it on the typical desert roads you will find leading to popular off road play spots. As long as the road is hard packed and not sand it does well. The axles are flipped so it has plenty of clearance.
Yes having the extra room is great especially if the weather turns bad and you are stuck inside for a few days.