Rick,
First and foremost, I must warn you....Turkey Hunting is addictive!! Don't go!!
If you have to find out for yourself, I'll give you the following advice:
1) Camo - Turkeys have very good eyesight, they see movement, camo helps break up the lines of your body so they see "less" movement. Being still and quite is MORE important than camo, but camo doesn't hurt. A camo sock for the gun wouldn't hurt either, not required though.
2) Chokes & Ammo - This is where it gets tricky, you don't NEED anything larger than 2-3/4", You have a 3" chamber you probably want to use a 3", it all depends on what patterns best out of your shotgun, #4, 5, or 6 shot works well for turkeys, I find that the smaller #6 lead works the best for me. Use your FULL choke for now, that way when you miss you can blame it on the choke (then after you're "hooked" you'll spend lots of $$ on different chokes).
3) Shooting distance - You say that the area offers 50 yard shots, don't take a 50 yard shot unless you know what your pattern is at 50 yards!! I hunt with my kids, they both use 20 guages, we don't shoot at anything outside of 40 yards.
4) You don't mention if you'll be calling or if someone else will be, less is more, quieter is better.
Good luck and please post your results.
I have been turkey hunting since I could carry a shotgun with my grandfather, I have been out 5 days already this season (2 in CT and 3 in PA), I have heard some gobblers but so far have only had "tag soup".
Turkey Hunting isn't a matter of life or death....it's much bigger than that"
....you have been warned......it's addicting.......welcome