We'll be visiting Yosemite in early August and first, planning on driving through the park on hyw 120 (we'll come back later for more sight seeing in a car). How is hwy 120? We have a 35 ft motorhome, and are wondering if there are any restrictions for larger vehicles, or if curves/hills are too difficult? I understand there is an older part of this road with 18% grades, but is the newer route traversable in a motorhome? Thanks, Chris g.