Hi 42erjh,

Thanks for reaching out to us! For more information regarding campgrounds and campsites in Yosemite National Park, please check this page: http://www.nps.gov/yose/planyourvisit/campground.htm

To contact Yosemite National Park, call 209-372-0200 (then dial 3 then 5)
The public information office is open from 9 am to 5 pm Pacific time (closed for lunch).

We hope this information is useful! Feel free to contact us if you have any further questions.

Best,

American Park Network