Spent 9 weeks touring Alaska and didn't have a single problem with rocks. I felt the roads were better up there than they are here in Michigan. They don't know what pot holes are. Occasionally there were rollers in the road but if you slow down they aren't a problem. I did have two flat tires, one on trailer and one on truck. The truck tire hit something in the road while passing a load of junk that was broke down next to the road. The trailer tire went flat over night in campground. Also if your going by the Air Force base in Fairbanks don't stop and take video's of jets taking off, military police (although very courteous) frown on it.