Need advise on tow vehicle 3500 or 3500 dually

There have been times that I was glad to have a dully and times I wish I didn't have a dully. While driving in Charleston and Savanna the streets are very small (built in the 1700's)and it was close to drive down them and they didn't want me in there parking lot(took up too much space), then there were times I was driving with a side wind and over mountains that I was glad to have a dully give or take a dully is good to pull with but not to sight see with. You have to make your own choice. We are pulling a 36.8ft fifth wheel and we like it.