I have the T model.. although I expect it, I have yet to encounter a park that does not want the softside. However, i do not open the tent in 2 conditions: 1) aforementioned restrictions 2) too dang hot that the AC cant keep up. We had a custom mattress made, which if I did again I would do just a couple inches narrower for this very reason. I turn the mattress 90 degrees and sleep on the dinette.
We learned there is a species of bird in Texas that when you are near a light, they warble all night long. Bad use of a tent.
Another trip, to Arkansas, the AC was like a toy for some reason.. so I just closed the tent up. Worked great. When I go out by myself.. I don't open the tent.
I am pretty pleased actually. Your right though.. I bought it sight unseen. When I go to Yellowstone this year i expect to not be able to open it. So I will sleep on the dinette. My dog however might night like the floor as there will not be room.
Derek