We went a couple of years ago, before we had our Escape, but just for the day. (Since we're in Ventura Co., it's a short drive.) There were a few Escapes, and then a whole variety of other small trailers, and a bunch of really nice folks. It was a fun, and informative, day.
It's about 125 mi. from Tehachapi (via San Francisquito Cyn road), then CA-126 to Ventura, then up CA-33 to either Casitas Vista/Santa Ana Rd (@ fwy's end), or continue up CA-33 to MiraMonte, then left on CA-150(Baldwin Rd).
P.S. Since we were there just for the day, we parked outside the front gate and walked in, so it was free. (Always a good consideration!)