F250 CC SB 4x4 6.2-3.73 or 4.30 for 10,700lb travel trailer

I have a 2015 F250 CC short bed 6.2 with 3.73's. I do not have any trouble and we travel through the hills of New England. I wanted a diesel for my second TV but met a few rvers who tow fivers with gassers and they don't seem to have a problem. While I not going to tow a 40footer ever, this set up with the 6 speed works perfectly for us. Id rather save the $10k difference to put into a fiver than the diesel engine. This set up works for us. Happy Trails