Actually, it would be interesting to rotate through all of the parks in the desert. Each one has a little different 'flavor' and they're all pretty good. I haven't been to Anza Borrego in many years now, but I camped there regularly through the '80s...
Stay at Palm Canyon for a while, but when you get tired of the crowds, check out some of the San Diego County parks as well:
County of San Diego: Camping Park Information
AIR 2053 Current: 2006 Born Free 32 RQ Kodiak Chassis, & 1995 Coachmen B-van
Former Airstreams: 1953 Flying Cloud, 1957 Overlander, 1961 Bambi, 1970 Safari Special, 1978 Argosy Minuet, 1985 325 Moho, 1994 Limited 34' Two-door, 1994 B190 "B-Van"