You might have seen San Diego's Frank Motley. He recently got an off-road trailer for his 110.
Also in the SD area for 110's are Ze Burity, Andy Nichols and myself. There at least two more that I am not too familiar with.
I tow a USA VentureCraft trailer behind my Rovers.
There are several 90 hardtops in the area.
Land Rover Club of San Diego
1993 NAS D-110 #55 (GNUTRUK)
2004 Disco II (DSCO DOG)