I have not figured out roosting as well as I would like... But I have noticed a few things:
*With plenty of good roost trees... I feel like it is more common to see boys in one tree (or several), and girls in another. Outside of certain weather conditions, I do not typically see hens/toms in the same tree roosting (in my area).
*Hunting rolling oaks, I have noticed that turkeys seem to prefer digger pine roosts over the far more prevalent oaks.
*When they pitch out, it seems to me they prefer to fly downhill
*If you have a bowl that the birds like to strutt in, look about 3/4 the way up that ridge (surrounding the bowl) for a roost tree.
*I feel like the hens generally pitch out before the toms. (Those first couple days when hens sit on the nest as opposed to roosting in trees, are prime times to pull in a tom right off the roost in the morning).
*I have been frequently surprised at how far away the toms will pitch down from the hens (already on the ground)...
*I feel like the toms are more choosy about a roost, and like the old dead snags, where hens are more likely to be in greened-up tree. (Maybe due to better visibility or needing stouter branches?)
*Weather conditions can dictate differences in preferences for roosting trees.
*As more and more hens are sitting on the nest as the season progresses, toms will change roost trees by further and further distances.