Especially for the first hour after fly-down, turkeys are still trying to assemble and find eachother to begin the day. Yelps are their assembly call so alot of yelping works well in the early morning. Also mix in some cutting and clucking. Later in the morning when a gobbler gets lonely, I try to fire him up as I would right after flydown, if I get a vocal gobbler then I am in business, if not then I go to an area I know turkeys feed during the day and thats when I use the soft calls like clucks and purrs and at most some medium yelps. As it gets within a couple hours of fly-up time, I go to a frequent roost area and use the soft calls again hoping a gobbler will hear and come looking for a hen to roost with. So with calling, for me, it all depends on the time of day, and the mood of the longbeards.