I did it both ways last August, but it was on a Polaris RZR. It is doable with your set-up but don't expect to be in a hurry. We only met 4 or 5 full size vehicles the entire trip while traveling on the single lane roads. We did however see a large number of ATV's of all shapes and sizes. You should have no trouble getting around them on the single lanes. I would warn you not to go too early in July as you may encounter snow drifts in the road at the upper elevations. We went in early August and did see snow, but none was on the roadways.