On iPad, pre-trip, InRoute. In addition to being like other route-mapping apps, it has RV parks and other RV-friendly waypoints that you can program at specific intervals (XX miles, 1/3 of a leg) and find RV parks
On the road, Garmin nüvi with POI app for low-overhead warnings; and on iPad or smartphone, ParkAdvisor. Once it detects that you are on a road, it shows RV-friendly filling stations, parks, waysides, and other RV-friendly stops which really helps when making sure you exit a highway to a service station that can accommodate your rig
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