at mount Laguna.. about zip.
Try Cibbets Flat instead. Cibbets Flat
Actually, anything that is easy access off of Interstate 8 fills up pretty quickly on a weekend. When I camp at Cibbets Flat, I take the trailer up on Thursday night and Robert stays there while I come home and go to work on Friday. By the time I get there on Friday night after work, the park (only 23 RV spaces) is full, and a parade of Lookie-Loos drives through hoping to find something.
I highly recommend Oak Grove
instead. The easiest way to get there is north on I-15 to Temecula, then south on Hwy-79. If you want a scenic country drive, then take Hwy-67 or Hwy-78 to Ramona, then Hwy-78 to Santa Ysabel, then north on Hwy-79. With 81 campsites, it is never full.