I wouldnt do much wheelin at rainbow, it looks like a great little place but its private property, plus the mountain bikers have takin it over for some cool down hill action. There is some blm just on the north side of hemet that ive been wanting to check out oh and also oak mt. Just on the east side of temecula if we could find an access to it. Ive been looking for a while and its pretty limited but if you look hard enough there are a few unknown places that seem like they could produce some fun.