SF Bay Area to Bridgeport, CA

Pulling 24'TT from East Bay to Bridgeport. Several options exist including:
1. 120 East through Yosemite to 395
2. Hwy 4 to Markleville to 89 (Monitor Pass) to 395
3. 50 to 89 to 395
4. 108 to 395 (Sonora Pass)

I was advised to stay off the 120 route because of the Priest Grade.
Also advised to stay off the Sonora Pass, 108 to 395

I believe this is a fairly traveled RV route and appreciate any advice. I am OK with some Mountain Driving to a point, but am certainly willing to drive a bit further if necessary.

Mark