Well you asked...... and got some really great info!
I would second getting a good full choke and pattern your shotgun or you will miss, wound or worse.
If you are counting on those fall turkeys being in the same location this spring I wouldn't count on that, it does happen I have a flock here that stays in the same area all year but other flocks I hunt migrate same as big game does.
Talk to your local game warden farmers etc. to help you locate a flocks area then go in high and call after dark.
Be safe and good luck.