We travel with 4 American Shorthair Cats (Show Cats). We removed the back seat in the TV and installed an Ultra Lite Cage up on a low platform which gives room for storage under the cage. I added a divider to the cage makeing an upper and lower level, with litter box, food, & water on each level. There's a pass-thru hole between levels, but if not getting along it can be closed off makeing two separate areas. Wouldn't let them ride in the rig unless they were confined as there is an area under our bedroom slide where they could get up under the bed. Would hate to have to disassemble the rig to get them out so we could extend the slide.
Now a slight disclaimer here, they have been traveling with us since they were kittens so they have logged more miles than a lot of people.
Michelle & Ann
2018 Chevy 3500HD Crew Cab High Country DRW, D/A, 2016 RW39MB, Dual ACs, Auto Level, Auto Sat Dish, Stack W/D, King Sleep #, 17.5" Sailuns w/Disc, MORryde IS & Pin, Comfort Ride Hitch, 5.5 Onan, Res Fridge & Induction Cook Top