I think it depends on what kind of PUP you have. Does it have hard folding walls or just a curtain? let us know what your make and model is so we can relate. I had a Rockwood HW 276 PUP before my Roo.
"Take The Road Less Traveled"
2013 Rockwood Roo 233s
2013 Ford F150 FX4
I've been an RVer since 2007, Lifetime Camper