Cross Trek 20XG ft sleeps 3. Smaller and easy to drive. Transit 3500HD 3.5 eco drive 
The garage will hold mountain bikes, snow skis, fishing, camping, hiking in the mountains or desert then this will be perfect for you. Solar power or electric power hookup. It doesnt matter. Includes two extra suitcase solar unit for extra power. And yeah, you can run a/c on this! The Cross Trek is know for the rear garage. You can store motor cycles, mountain bikes, bbq grills, sporting or band equipment. I ran my Honda generator at times with plenty of of air circulation. New; awning, cabin door and house and truck batteries 1 year old.
Boondocking or State Parks, it doesnt matter!