I have had a Garmin 3590 for 8 years and it still works great. It can not be set up for RVs but you can customize routes. It does occasionally give the wrong routing, but when in doubt following the Garmin is usually the best. Auto traffic updates are a must if you tend to drive through cities. The current Garmin for RVs is the model 780 or 785 with dash cam.
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Jim & Roy Davis
2016 Hurricane 31S
1961 Rampside in tow
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