We wanted to visit the ghost town of Bodie and explore around Mono Lake so we stayed in Lee Vining at Mono Vista RV(which is a very nice CG) off of 395. The campground is less than a mile from 120 which leads to the east gate of Yosemite. We drove into the park four times for all day excursions along with some great Jeep roads in the area. Yosemite and backcountry roading(they even have glossy booklets with included maps to encourage off roading) were some of our favorite adventures. We stayed a full week in the area and even Jeeped some old stage coach roads...what a blast.
When we left, we drove 120 to 41 and headed south past Fresno to Three Rivers for visits to Sequoia and Kings Canyon NPs...If possible, do not miss Kings Canyon - it was one of our biggest surprises of the trip.
BTW, we did disconnect the toad for the long pull up 120 past Tioga Pass. Reconnected and had no problems with the roads inside the park...it's kind of slow going anyway.