Been there, done that
We just traded in a 2006 Keystone Hornet. It was a 35ft TT and had a sliding glass door. Only used 4-5 times a year but never had any issues with the door from a towing aspect. We bought the camper thinking we would love being able to see out, but what we found was the poor people sleeping in the LR were woken up BRIGHT and early by Mr. Sunshine and when it was cold outside, the big glass door was cold. Not to mention the dog nose smudges from our fur babies. Our new 37ft Avenger just has a standard door, I'm really excited about that.