Down thru the years I've had good luck with Magellan GPS units. 15 years and counting... also good refurb's cheap, and excellent support. Had a minor glitch in one unit. They shipped a replacement, and then authorized "prepaid" UPS to ship back the defective unit.
Check out their RV Road Pro RV9365. Lots of databases, and points of interest. Dual mode, also. Just load your RV specifics, and decide whether your "Hooked" or "Bob-tailing". It will route you accordingly. Free LIFETIME updates, usually includes free shipping. Bluetooth etc...
http://magellan.factoryoutletstore.c...our+Flash+Sale
Don't trust OEM, once you bought it, you paid too much, and you own it!
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Pull Toy
Steve & Jan, Ava & Emma (Mini Schnauzers):
2016 F350 Lariat 4X4 Powerstroke CC/SB "PULLTOY V"
2013 Alpine 3535RE "MAGIC CARPET IV"
Proud Navy Vet!