One place I hunt has a good amount of owls and hooting definitely gets them gobbling. I get to a spot where a bird should be (within hearing distance) well before the sky starts to light up. I usually let the birds start chirping and give the owls a chance to start making noise. It should still be dark, but just light enough that you don't need a flashlight. If I don't hear any gobbles by this point, I let out a hoot sequence. This will either get a turkey to gobble or get the owls going which will also get the turkeys gobbling. Once I hear a gobble, I head in that direction and hoot one more time verify position once I close about half the distance if it is far enough to make it necessary. Like yelping, I try to hoot as little as possible to get the job done.
If nothing happens, I wait until about 30 minutes after typical fly down before moving to another spot.