They're right. I grew up up here in the Lake Arrowhead/Big Bear region and we have a ranch down in the Crab Flats area. Try 3N16 from Crab Flats Campground to Big Pine Flats and on to Holcomb Valley and the Lucky Baldwin Gold Mine. Very scenic, very easy. If you're into the more moderate trails, try hopping onto 3N16 from Deep Creek from Hook Creek rd. and on up past Tent Peg C. G. . It used to have a nice bouldery rough section we locals liked to call "ballbuster hill". heheh. lots of fun, but not hard like the John Bull or H. Ck. .
We live 4 miles off the main highway at Green Valley lake, so everyday it's offroad just to get home. Great place to start, and have some backcountry fun...
PM me if you want locations on where to have some mtn. activities, like the Deep Creek hot springs (off 173), swimming holes and cliff jumping by Gilligans Island, or some hiking trails or rock climbing in Holcomb or the Pinnacles.
glad to have you in the Big Bear mountains!
cheers!