I don't mean to be critical of people driving on flat land most of their RVing life. Many of them know how to ascend and descend mountain grades from their trips. However, if someone is out shopping for RVs and talked to a sales person I'm sure they will try to sell you the biggest diesel on the lot. Nothing wrong with diesels but gassers will get you there also. I drive over several steep passes in Wyoming several times a year with my V10. Never had a problem. Hauled cattle in a goose neck over these passes with my V10 PU with no problem. If you have never driven mountain passes in anything but a small vehicle you need to be aware of how to drive a large vehicle down these grades. It requires a little more skill than zipping in and out of traffic and using your brakes down the grade. In a large vehicle you will burn up your brakes if you don't know how to descend a grade properly. Believe it or not some of the best info available is in your driving manual. Well, probably not in states with no hills. :S
