Another thing you could do is get a Garmin 760 RV NAV unit. You enter your weight, width, and height and it will avoid anything that isn't right for your RV. I didn't have one on my last 40' rig, 102" wide, 16k rig, and never had to turn around once in 10k miles and 7 states/Canada. This one came with it as part of a NAV/Back Up Camera option on our new rig and worked fine on the 800 mile trip home from OH. Like most options, I don't feel I need it, but I do like gadgets so I'm glad I have it. The back up cam showing up in the NAV screen is cool too.
Bottom line, you'll be fine on your trip. Use a ladder as a analogy. If you can climb a 10 footer, you can climb a 12 and so on. It's just one more step...