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This is one of those questions that will get a lot of different responses. There aren't a lot of RV specific GPS units out there. Many people don't use the RV specific ones anyway, many use more than one, many just use whatever is on their smartphones (or tablets.) There are lots of ways to accomplish the "how to get there" part, it could be the trip planning that is a little bit more difficult to find.
2016 Thor Hurricane 35C with pups Piper and Annabelle
2013 Ford Fiesta toad
FMCA - F457085
Blog - https://traversity.us