I know birds that I hunt are going to roost at night in one or two places. There are two very large pine thickets on the property I hunt. This is the best advice I can give you find a pine thicket. Now the birds will still be hard ti find visually on the roost, but if you have modest numbers in your turkey population, or you have seen birds where you hunt I will bet you that they are roosting in a large mature pine thicket. Trees about 55-65 feet tall with good sturdy roosting branches. I have seen some birds roost in the middle of the afternoon in oaks, poplars etc, but when dusk comes it's off to the pines. Easy way to tell if your pine thicket is holding birds, look for feathers and scat, the ground will also be torn apart from them flying down and scratching.