Lots of folks use 120 in both directions, with all sorts of RVs. It is really not that bad. Lots of pullouts available. I have towed it probably six or eight times (with a small trailer). Use a lower gear on the way down.
The scenery is stupendous -- if you can spend some time along the way, do it! Unlike Yosemite Valley, the high country along 120 is cool and comfortable in the summer.
And 395 from Lee Vining to Carson City also goes through very beautiful territory.
2012 Fun Finder X-139 "Boondock Style" (axle-flipped and extra insulation)
2013 Toyota Tacoma Off-Road (semi-beefy tires and components)
Our trips -- pix and textAbout our trailer"A journey of a thousand miles begins with a single list."