Welcome to the forum and being a new owner. There isn't a "north county" club per say. This group is very informal. You can also check out JustRuns, SD4wheel. You can google it find some others. People on here are very helpful, but may tease you (each other) some, so don't take it personal. Justruns has some trail descriptions. There is a book, Southern California off-highway drives. Justruns has some equipment requirements.