Varmint calling is a blast, Erik, and if the animals have never heard a call before, they are
really suckers.
The best calling I've ever done wasn't with electronic or even handheld call. It's just simply "mouth calling." I could teach you how in about 2 minutes.
Keep in mind all these critters are super sensitive to almost any form of squeak or squeal. The closer they get, the softer and weaker the squeaks get. Makes the predators crazy to get in and grab the prey...which turns out to be THEM.