If you use Garmin RV or Rand, you still should consult a Trucker's Atlas when traveling. It only takes a couple minutes. There is a section for each state that lists all their low clearances, simply look at the list to make sure you won't be anywhere close to any.
Full Time in 2017 Newmar Ventana 4369
pulling a 24' enclosed (Mini Cooper/Harley/Kayak)
(traded 2014 Thor Challenger)
US Army 70-73 Retired LEO