We use RV Trip Wizard. It provides altitude and grades and knows you height, weight, length, propane, etc. We also just got a Garmin RV 785, which I like better than the Rand McNally RV GPS. I also cross check with the Rand McNally Motor Carrier's Atlas.
-Angus
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Joan & Angus Campbell
Winters in Las Cruces, NM, traveling the rest
2019 Pinnacle 36SSWS "Diana"
2019 F350 DRW Lariat CC Long Bed Diesel "Sheila"
3 Chihuahuas and 4 cats
We don't camp, we don't glamp, we LIVE.
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