Depending on ride height adjustment, the top of your satellite dome is the tallest measurement and that should be close to 13-ft (actually 12'10") but err on the side of worst case.
Don't hesitate to call one of us here at Parliament/Coachworx is you need help. Stranded on the side of the road is not a good feeling.
Also, realize that since you now own a Prevost, the 24-hour Action Line is available to you in the event of a vehicular issue as you travel. That number will get you road service no matter if you are in warranty or not. Just call Prevost and get set up with a Customer number, and you can also order your own parts if you need something like a hard-to-find belt or entry door handle, etc. The number for the Prevost Action Line is 800-463-7738.
I hope you enjoy your "maiden voyage" in your new coach.
Sincerely,
Ben Cummings
U.S.A. Luxury Coaches, LLC
Clearwater, FL