We have driven Tioga Pass road many times in our 36' DP, dozens on our motorcycle and even more by car in the 30 years we have lived near Yosemite. You don't say when you will be traversing Tioga (120), but it usually doesn't open until Memorial Day weekend....sometimes as late as the 4th of July.
First, if you need a place to stay before tackling the pass this is a nice scenic campground right in Lee Vining, elevation 6700 feet; RV Park Reviews :: Lee Vining, California ( CA ) - RV Parks and Campground Reviews
Second, the 8 miles to the entrance station will average 8% grade, gaining IIRC about 3K-3.5K feet. You will be on the inside of the road so it won't be too intimidating for anyone in the MH. There are pull outs on your right on the way to the top, but we are able to keep up with the traffic. I'm not sure if I would use a pull out....I don't know how much power you will have at 9K feet to get rolling again, and you can use pullouts after you crest, before the entrance station. Most people are sightseeing on the way up anyway
From the Tioga entrance station to Groveland the road is good with numerous pull outs. Here is the link for vehicle restrictions: Yosemite National Park - Vehicle Restrictions (U.S. National Park Service)
You can see Tioga (120) cut on the left side of the picture.
Third, IMO places to stop for a view are Tuolumne Meadows (Lambert Dome is a nice scramble), Tenaya Lake, and Olmsted Point. Patty and I feel this part of Yosemite is truly the most beautiful. Of course the valley is a must see.
Enjoy our beautiful treasure.