I think that is awesome you would like to try to take one with the bow and if that what your heart is set on then go for it. In my honest opinion you might want to think about trying to get one or two with a gun first though. Turkey hunting can be very challenging and very frustrating, especially when you are just learning the ropes, and using a bow. Once you get a couple under your belt and get the hang of things then try taking a few with your bow. But like I said if that is what your heart is set on don't let me talk you out of it.
As for any specific gear you need, you are already off to a good start. You need full head to toe camo, including gloves and facemask, a call or two, gun or bow and you are set. Granted there is lots of specialty gear you can get, but most of it is optional. As for tactics to use, the first thing i would do is try to find out where the birds are roosting, as they generally return to the same areas. After that see if you can figure out any travel patterns they might use. This is important because you always want to be where they are going or want to go...even the best calling in the world wont do you any good if there are no birds around, or you are some place they don't want to be already.
As for calling, keep it fairly simple. Learn the basic yelp, cluck and purr, then from there you can work on the more advanced stuff like keekee runs, cutts, cackles, etc. there is a fine line between calling enough to keep a bird interested, and over calling. Unfortunately that line moves around a lot and what works once, on one bird, in one situation might not work on a different bird in a different situation. I call it "taking a birds temperature", if he is real hot and gobbling at everything you can pour it on because that's what he wants to hear, if he is real quiet and hardly gobbling or not gobbling at all you might have to really tone it down, or stop calling all together. Learning how to call only comes with experience though and you are bound to mess up more then you get it right but that is what keeps it fun. It also depends on what time of year we are talking about, what works in the spring (breeding season) probably wont work in the fall. In the fall i tune it way down, just throwing out a few yelps and clucks, and try to ambush them as they go to roost. Anyways i hope that helped some, good luck out there!