Wifeys parents had a trailer...
I prefer good ole packing and tent...but my wife is.....ummm....semi-delicate
Anyway, we went to Julian one time. That is a pretty nice area...there is a state park out there and the town is pretty cool....also a very cool mine tour...I think it runs year round...not sure of the tempartures currently though....was very hot when we went.
Also we went to...damn....there is a camping spot near Pendleton...just north of San O'. Damn...still can't think of the name...but if you take the exit adjacent to Tressles, you know there is a Carls Jr. right there, and go east it is about 1.5 miles off the freeway on the south side of the road...Sorry..can't think of the name...but by that description you can figure it out. Tressles is within walking distance....actually a nice hike. If you are surfing though....drive back toward the beach.
May be able to get into San O' too....get some freeway noise but the beach is close....Trail 5 was always my favorite.
GL.