First off, why are you hunting Christian turkeys? [8D]
Chuck, there are entire books which answer these questions and the turkey forum you posted this in is a good place to learn.
Since time and space don't permit, I'll offer a nutshell advice.
Find out where the gobblers are roosting. If you can get out to the general area the night before you hunt and listen, you might hear a gobbler or two sound off from their roost tree. An owl call might assist you here since they often will gobble at owls. Knowing where they are will greatly assist you the following morning in setting up. Try to get in as close as possible without spooking them. Get in early under total darkness before they begin to wake up.
Call very sparingly -- only a couple soft yelps -- AFTER you hear other turkeys calling. You may be able to fine-tune your set-up once you know where they are. If you hear a gobbler answer you from the roost, do NOT over call to him. Calling a lot will likely make him stay on his roost longer and wait for YOU to approach him. After he's on the ground, you can pick it up a bit. Cutting is deadly, but I like to wait a bit longer before I employ this.
If he goes off with real hens, you can try to circle around in front which may or may not work. Eventually, the hens will leave him to go lay their egg and he'll be alone . . . and workable. This often doesn't happen until much later in the morning.
If you aren't able to get them to come in to your calls, go to a known strutting area, or, since the dry riverbed looked good, go there . . . and wait. Give a series of yelps every 15-20 minutes and see if they come in. A lot of times, the gobbler will be silent when he's with hens and they could suddenly show up where you are with him bringing up the rear.
This is just a brief synopsis and probably will need more fine tuning since every situation is different. Hope it helps.