We are currently sitting in Flagstaff. Drove feom Reno to Williams last Friday, spent Saturday at the grand canyon. Drove into Flagstaff yesterday to a repair shop to have some issuea addressed. Took just the TV out yesterday to visit the Petrified Forest and Painted Desert.
Regarding road grades, nothing really significant. We have come down from Alaska, and there have been a lot of areas that are much worse in British Columbia (one hill hit 10% for 500 meters) and even I-5 in southern Oregon.
The wind is blowing significantly, and sometimes a crosswind. Will require you to slow down, but the bigger issue is when passing or being passed by semi's. We are going to be heading west on Wednesday, and hopefully the winds will die down some by then...but I don't think they are suppose to.