We also have a Garmin 760 and are very happy with it. That being said, we did have a trip where it tried to put us on a road which was not fit for a motorhome. Thankfully a local came by. He said his truck wouldn't even fit on the road the GPS was sending us and gave us directions to get back to a major road. Yes, I did contact Garmin and notified them of the problem. Lessons learned!! Don't trust your GPS as your only source to get you there!! We use the GPS as a guide, then check the maps (old school), Google maps, and follow the directions given on the campgrounds website.
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Vera & Ken
1998 Holiday Rambler Imperial