Come out and enjoy the dark skies at the spring CalStar on April 19th-22nd, located at the overflow campground at Lake San Antonio. 
There is no pre-registration or pre-payment, just show up and pay the current Lake San Antonio camping fee for the number of nights you will stay.
This event requires you to have your own shelter or motorhome, warm clothes, sleeping bag and food. There are stores nearby at Lake Nacimiento, Lockwood and King city.