I roost birds when I hunt a new area and not always the night before a hunt maybe a week before, then I'll sneek in very close to the roost sometimes no calling sometimes I'll do a soft yelp and a tree call using a wing against a tree and after they hit the ground I'll do some yelping.
If no luck I'll try and head em off and ambush a nice tom or stay within a 1/4 mile of the roost calling intermittently finally I'll go back to the roost later in the afternoon and just wait for a gobble.