Allen,
I have a Magellan 7" Roadmate, I forget the exact model number right now but I've had it for about 4 years. We bought it at the Quartzsite RV show when we first joine the Beaver Club. I am ready to replace it, and I think I'm going to go with the Rand McNally 7730 LM RV GPS that has lifetime map updates. The Magellan has taken us on some routes that you really wouldn't want to be on with a Motohome despite the function that you can enter the vehicles height, weight, etc. On the Rand McNally web site you can setup trips and get directions there. Rand McNally also has a tablet with a built in dash cam. The BAC Amazon page also has these.
Cheers!
Dean