If I had a walk around bed, I would prefer bedding just like at home.
My popup has the bed sticking out the back. We like the Travasak for that situation. The Travasak is essentially two sleeping bags zipped together with a sheet that attaches with Velcro. It is easier to wash the sheet than the entire sleeping bag.
Wayne in San Jose
TV1:2002 Chevy 1500HD 4wd Crew Cab,Valley Odyssey brake ctlr,McKesh mirrors
TV2:2008 GMC 2500HD long bed 4wd Crew Cab,GMC brake ctlr,GMC mirrors
TT:Trailmanor 2720
Honda 2000
Yamaha WR250R,Polaris Sportsman 700 X2,Polaris Scrambler 500
Had a queen bed in our TT. I used regular queen sheets and just used "Sheet Belts" - the elastic belts for the corners. Never had any problem with the sheets coming off.
Just traded for a 5ver and it has a king bed. I bought regular king size sheets and did the same. They are a little big but the sheet belts take up the extra and hold them tight.
You can use the 'sheet belts' and then use the same sheet set as at home. Many people do this. We have sheet sets that have elastic all the way around the bottom of the bottom sheet. Keeps them nice and snug. We bought them at one of the large department stores on sale - less than $40. Works for us.
We have the 60 x 80 queen bed and I use regular queen-sized fitted and flat sheet sets. They fit to a 'T'; however, we did put an egg-crate mattress pad on top, along with a pillowtop mattress cover ~ which probably allows for deep pocket sheets to fit. I think most sheets are made for the thicker mattresses sold these days, but you might want to avoid any that states specifically for 'extra' deep. Hope this helps.
Happy & safe travels....JW