Be there the night before opening around 9:00-10:00pm and plan on sleeping in your car as they only allow so many in at one time. The line gets LONG fast. Work the outside edges and be in shape as when the gates open hunters will be running to get to an area. Most of these birds are presured all ready so if you get on one and can shoot do so as someone else will bust your setup if they hear a gobbling bird.
Good luck