1.)Is multi-day/overnight backpacking and hiking allowed? 2.)Do I need a permit for a overnight/multi-day backpacking/hiking trip? 3.)Will parking for an overnight/multi-day backpacking and hiking trip cost money (how much?) or is parking free?

1.) You can stay wilderness camping 14 days 2.) no permits required lots of trails and hiking remember to bring climbing gear it will be needed 3.) As long as your tiers of ur vehicle is not touching the Road you may park if ur not planing on staying in designated camping spots i would put a note in your window that you are camping on the trail for x amount of days the rules are clear and at the information lodge at the beginning of mountain

You may camp within the forest anywhere for 2 weeks at a time, so long as you're at least a thousand feet away from any main road. When parking at a trailhead, this 2 week time limit will apply. there is no fee for these activities