First, I'd set the cams a little lower than you would when mainly targeting deer. Somewhere around 12 to 18 inches above the ground is about right for turkeys.
If you have cams that allow and you know how . . . . . .
Set them to take pictures on a scheduled interval, without having to be triggered by a turkey. Doing this can be of great value in fields and open woods, and you can much more quickly determine if turkeys are regularly using the property, as compared to just pouring out some corn and placing a cam over it. If you're just wanting turkey pics, disable the flash and set the cam to only function during daylight hours ---- you'll get much longer battery life and not fill you card with unwanted pics of nighttime critters (like possums & coons).
Lastly, I personally will never again use corn to attract turkeys in front of a cam. It does work, but the risk of your turkeys dying from getting a bite of aflatoxin is just not worth the risk to me. I learned that lesson the hard way, and was using certified aflatoxin-free corn from the Co-Op. If you get the "deer corn" from Wal-mart, you can expect it to have aflatoxin. The "aflatoxin-free" corn can still develop it after you put it out (it is just free of this toxin when tested).
I know many who will claim that corn doesn't hurt deer and turkeys, but I've seen it happen, and think most people would never know when it killed some of their turkeys. It's not likely to kill deer, but as with turkeys, it can make them sick and more susceptible to disease and predators. (Anytime you get a turkey coming & going to a specific spot, that turkey is much more likely to be ambushed by an observant coyote or bobcat.)
