Good advice so far, especially on roosting the birds. I hunt them in the midwest so it may be a little different for you but I like to scout from a distance with binocs and observe where the turkeys like to go after they fly down in the mornings. It is much easier to call a gobbler in to where he wants to go any way.
It can be very difficult to call gobblers away from hens at times but sometimes you can get a hen or two interested in your calls and decoys. If the hens start drifting your way the gobbler will follow.
I have had very good luck killing birds mid morning when many of the hens have gone off to nest and the gobblers are alone. They can be much easier to call in during that time. If you find two or more gobblers together with no hens many times they can be called in. All it takes is for one of them to start coming to your calls and the other ones will many times start coming also, many times ending up will all of them trotting towards you so as not to be left out of the action.
As far as calling, there is no magic formula but if I have a turkey gobbling and moving my direction I cut back on the frequency of my calls as the bird most likely already knows your exact location and over calling may discourage the bird from coming into range as he may stop and strut back and forth. There are lots of good DVD's and youtube videos out there, take advantage of those to learn calling. For just starting out a box call or push button call will do all you need to do to call in birds. Mouth calls are very versatile but can be hard to learn for some people.
As far as using a bow, if you are using shoot through mesh on your blind you will want to use a fixed blade head but otherwise I would recommend an expandable. Not neccessarily a huge one but three blades are better than two. Be sure to get to know the anatomy of a turkey so you can place your shot in the vitals. The best shot opportunity is when the bird is facing away from you, that way you have the whole spine as a target. Be ready to get out of the blind and chase down the turkey. I've had a few of them hit the dirt at impact but I've also had a few take off running or even flying. They leave very little blood trail so it is best to not let them run off.
Best of luck this spring!
Sam
NRA Life Member
Leftys are the only ones in their right minds--and I ain't talkin' politics!