As others have suggested, I think you will be fine with the V-10. To help you plan your routes and help avoid issues, consider getting yourself a copy of Mountain Directory West (www.mountaindirectory.com) which lists (and describes in detail) all the significant grades on commonly traveled roads and highways in the Western U.S. Last year, I used the directory to help plan out a Southern California to Pacific Northwest trip (pulling an enclosed car trailer behind MH). Great trip with no surprises. The publishers also make a similar directory for the Eastern states. Safe travels!
