I don't know i think you might run into a few hang ups with turkey hunting in a saddle.
First with calling, once they get into sight range they will most likely pick you right out and most likely get spooked. I know in the fall i have tried calling them to get closer and they have pin pointed the sounds and they know that something just isnt quite right and off they go.
Second and this is more my personal style but it doesn't give you much mobility. I don't even use a blind, ill slip in close to the roost and set up in my ghille suit and to just a little calling(birds in my area are very call shy). Often i find myself having to change my location to cut them off depending on where they are trying to go so i dont have time to climb down a tree not to mention they will be able to see a 6ft tall man coming out of a tree from a mile away lol! Also once you are up there you are stuck there until the birds relocate to a different section of woods/fields.
Lastly i am not sure what you are looking for either using your bow or a shotgun but i would think that hunting from the air with a shotgun would be difficult to get a good headshot and would end up putting more shot into the body of the turkey. On the other hand with the bow i think it would give you a greater advantage being that there eyes would be more focused at ground level than in the trees you may be able to draw back without being noticed. Although i know that there eyesight can see almost 360 around them!