I will be traveling from The Dalles, OR to Kingman, AZ which is just 100 miles south of Vegas and I will be towing my 19' travel trailer with my 1985 Diesel Suburban and as it is VERY slow going up hills pulling the trailer I wondered which route would have the least hills? I am thinking of going to Portland and taking I5 all the way down to Bakersfield then to Needles and up to Kingman. Mapquest shows going I84 to Twin Falls, ID and then down highway 93 from there but I think there is lots of up and down that way although I have not traveled it and am not sure.
Any suggestions would be appreciated. I will be travleing probably October 6 and taking 2-3 nights for the trip.
Thanks in advance for your time!