Can anyone recommend a GPS for the Bigger rigs for camping?

Came back a couple weeks ago from a 3300 mile trip using the free download of Co-Pilot with the voice option (about 10 bucks)on my Samsung tablet. Bought a mount for it at Five Below and it worked very well. You can preplan trips and save them. There are two selectable heights for campers. It will not take you on a route with low bridges or on roads that prohibit large commercial vehicles, like some of the parkways here in the northeast. I was very happy with it. Give it a try.....it's free!