When on the trail out there, I usually have the LED light bar on my roof rack on for visibility.For Anza, I recommend some bright chase lights if you dont already have. Some people like real jerks, especially in Fish Creek. Also some bright front lights wont hurt.
Almost had a head on collision with a FJ who refused to slow down on a single track as well. I was completely stopped already and he insisted on going 30+ trying to squeeze through inches from my bumper.