We just moved up from TT to 5th wheel last fall, only got one major trip under our belts prior to parking for the season. You will LOVE pulling the 5th, I found it night/day easier than the bumper trailer. I'll never say never but the backing up hasn't been an issue yet.
I will admit I could get the TT into spots I'll never try with the 5th. Generally speaking it's just BIGGER when in the campground. We're 8' longer, opposing slides means 3' wider and 2' higher.
All together = FEELS big and IS big but I'm not really worried about it yet.