Here is some info. Good Luck .
San Francisco;' www.sanfranciscorvresort.com'

South Lake Tahoe; www. Zephyrcove.com/pr-park-campground.php

Yosemite; www.yosemitepinesrv.com
http://jrabold.net/yosemite/campn.shtl

Sequoia; www.sequoia.national-park.com/camping.htm