Bear island is in the middle of Big Cypress. You have to purchase an ORV permit at the visitor center for about $50. The gates are locked and they will give you a card with the combination to the lock to get in. They have primitive camping and hunting out there. It's a mix of hard roads and depending on the time of the year anything from water holes to deeper stuff. I'm attaching a pic from a couple of years ago of me and the wife in my Bronco (3" lift w/ 32" tires) going thru one of the big holes. We would always go with a friend, neither of us had a winch, just a tow strap, but neither of us ever got stuck.