I use most of them and a lot of times let them Gobble on there own. Last Year,Nothing worked better than a Coyote Bark for me. Just plain Dog barks were working in the late morning. The best locator I have seen was a JackAzz sounding off in Kentucky...he would Hee Haw at day break and the Woods would sound off. HMMMM..wonder what Reed I could use for a Heeee Hawwwwwww...lol

My friend up the road has neighbors with the LONGEARED LOCATORS . Early mornings , no matter what the weather , those jacks will sound off . They've got birds cranked up when they wouldn't respond to our feeble attempts.
Last spring I threatened to buy one of the squeeze bulb bicycle horns . I have no doubt it will work , plus it should deter any other hunters from coming in on your area , especially on public land . I know I wouldn't go toward a loud horn to hunt , no matter how many gobblers shocked to it.