Well, they don't gobble every day. And, if they aren't there at all, then you know the answer to that. If you're pretty confident there are turkeys on the place when you're there and owls/crow calls don't work, then try some high spirited cutting with a high pitched long box or glass pot/peg type call. Sometimes you can strike a gobbler with some sudden, loud, cutting on a high pitched turkey call. Be close to a place you can set-up, especially on a small property, because a gobbler could be closer than you think. You need to be able to set-up right then and start working the bird. If nothing else works, find a good set-up spot on long ridge or bottom, and set-up for a couple of hours giving some soft, seductive, low volume yelps and clucks. Use your hands to make scratching sounds in the leaves - lightly. Give a few soft calls every 15 - 20 minutes and just sit still and be observant. A turkey not in the gobbling mood will often respond by simply walking in, sneaking and peeking. Or, he may strut in drumming and spitting, but not gobbling.