You will LOVE turkey hunting! It is everything I love about both big game stalking and waterfowl calling.
My advice is make sure you scout right up to the day before the hunt. Scout don't scare them. Ideally you should try to find their roosting tree and "put them to bed" as they say. All the gear and calls in the world won't help you if the turkey's aren't there. I hunt private land down is S. Oregon and have made the mistake of locating them a week or two before the season and then they weren't there on opening day.
Camo: Go with what you like that is comfortable and matches your surroundings well. I use either MO Breakup or Advantage. Depending on the hunt, make sure you layer as the spring mornings can be cool to start and warm up quick.
Calls: As a first timer I would get a good tape, I used the HS Strut instructional tape. It will get you in the ball park. I now use primarily a diagphragm call and a box call. This gives me the flexibility I need while keeping my hands free. You may want to try one of the new push button yelpers as they sound decent and are really easy to operate. Someday I will get around to learning how to use a slate or striker style call.
Choke: Full, Xtra Full or Turkey. I use a factory full without problems.
Loads: 3" or 3.5" Copper Plated steel or Hevi Shot in 5 or 6.. I will probably use Hevi Shot this year.
Free advice: I make no warrantee's to this advice. Study turkey behavior and it will drastically help you. Tom's gobble so hens will come to them, not the other way around. You have to play "hard to get." Once you call, he knows you are there and knows exaclty where you are. Don't overcall! He may just keep gobbling and stay put waiting for this hot hen to come'a runnin'. If you scout and you know where he is at, you have 90% of the battle won. Get there before they fly down and set up quietly within 100 yards or closer if possible. You should be able to see them and definitely should be able to hear them.
Sorry for rambling, you just got me a little pumped!