There is only one small area to ride a quad LEGALLY on Bald Mt. side. Its called the Canyon ridge trail. Short ride, nice view, not worth the gas unless you live down at the bottom in the town of GAYcier and have nothing better to do. The lake side is totally closed, fat ticket and maybe some handcuffing (by a guy not a girl) if you ride there.
Been up a few of the roads on my Dualsport this summer and ALWAYS see a Forest service flatfoot and/or Boarder patrol looking for the black duffel bags comming outta Canada. Not a good place for quads i.m.o.
Hope this helps you