I actually did take a look at the GPS radio for an 05 Dodge but it was a couple years ago and pretty pricy. And the GPS wasn't RV specific. I once saw a mount that attached to the dash and could be flipped up if not using, it laid flat on the dash screen side down, and flipped down for use where the top on the screen was about even with the top of the dash. It took two screws to attach it but that's not an issue as my truck is an 05 and the resale wouldn't be hurt much. Trouble is that's the only one I have ever seen. We are getting ready for an 8000 mile 15 state trip in the spring. Lots of states I have never been in and don't know their enforcement policies.