I have lived on this mountain since 1989. It is nothing like the rest of SoCal.
We shifted to camping at Lake Elsinore and eventually stopped camping at all. The last trip to Elsinore was spoiled by a campsite full of red ants and no alternatives. Fortunately, the drive up from Chula Vista was easily retraced home.
The other favorite peak for my scout troop was San Gorgonio. I've been to the top of Gorgonio twice and San Jacinto on 5 separate trips.