You don't need a trail cam to scout turkeys. Unlike deer turkeys are quite vocal. You can hear them fly up to roost and fly down from the roost. The hens are especially vocal before and after flydown. Gobblers gobble and can be heard a long way. You can certainly use your trail cam to take nice pictures of them, especially if you pour out some corn or scratch feed, but I don't know what you will learn that will help you kill a turkey.

I don't start scouting until a couple of weeks before the season, and that consists of basically riding or walking around the property listening for gobbles at daybreak, finding where they are feeding and determining the general location of roost sites and movement patterns. Turkeys don't roost in the same spot every night but they might use the same general area and move in a general direction after flydown and then later in the day. Knowing that is important and can be very helpful.

My preferred method of hunting is going to a gobbling turkey and calling him in, so extensive preseason scouting really doesn't help me a whole lot because I am going to the gobbler wherever he his. I does help me to know where the hens are likely to be going, however, because wherever they go he will go too.