Good luck, you will probably need alot of it. I grew up turkey hunting in AL and down there, especially the public land is as tough as anywhere. I would not use a decoy on public land. I would get to my spot 2 hours before gobbling time, maybe earlier. There will be hunters everwhere.
I would be prepared to walk alot, and if you are going to the Talladega National Forrest or the Chocolooco Management area, it is really mountainous.
If I located one on the roost, I would get as close as I can, but will be tough as open as the woods are. Once I sat down, I wouldn't call to him in the tree at all. If you do, I would limit it. Wait till he flys down and call very soft and sparingly, just enough to let him know you are there.
I probably wouldn't try to blow a locator call if you are listening from the road. Hunters have probably already done this everywhere by pre-season scouting the past two weeks. Them turkeys get sharp fast.
This is from my experience on Choccolocco and Talledega National Forest, it may be different if you aren't going here.
good luck buddy, My dad and cousins are getting to go in the morning, but I can't until next week. So jealous
P.S. Another big tip. Google earth land you are hunting. Look for pastures, food plots, hayfields, thickets, whatever. I know that Choccolocco has some food plots planted, and Talledega has some pasture/field land and borders other pastures.Look for logging roads, and any information that may help you. Also, if the google earth picture is taken in winter you should know where the pine trees are, and we know that pine trees are good roosting sites. Look for creeks, turkeys love to roost above creeks, do not know why, I just have observed over the years that they do.
Do alot of walking/scouting through hardwoods. Turkeys are still probably feeding alot on acorns. Look for scratchings that are fresh, and sit and wait as long as you can stand it. Also, if your working a hardwood ridge, please listen and pay attention. A big flock of turkeys is pretty loud while scratching in the leaves. Look under pine groves for likely roost spots. Look in food plots for droppings tracks, dusting, etc. Glass and look out in big pastures. Them turkeys down there love to strut in them pastures.
Just hunt and have fun!