For San Francisco residents (and lucky non-SF residents who get in) - Camp Mather lottery registration ends on February 6, 2015. Camp Mather is in the High Sierras (outside Yosemite), and offers family camp that looks so awesome - activities and meals included.
To register, use this link and enter course code 39462. You can read more about it here. Nonresidents can apply as well, and will be processed AFTER residents. May 30-June 6 is inclusion week, for families with kids who have disabilities.