Note : Some GPS or phone would not give you a clear direction.
From 55fwy take Chapman east, will change name to Santiago canyon rd.
go past Irvine lake, about another 1000ft (1/4 mile)
take next left turn at Oak Canyon park.
From 55 fwy to camp around 10 miles
The address is 5305 Santiago Canyon Road, Silverado, CA 92676.