I get over 3 1/2 hrs from yosemite village to grant grove on mapquest. Sounds about right to me. Northwest of yosemite valley are Hodgdon meadow and crane flat CG's. Southwest is Wawona CG. All are ok, but don't have the grandeur of yosemite valley or tuolumne. Wawona is right at the south gate of the park, and is about an hour from the valley. It's also right by the Mariposa grove, and would shorten your trip to Sequoia to about 5 hours round trip.