couple of things come to mind, see if any of these fit. they either see you/hear you or smell you,or they see your vehicle, I can't imagine seeing that many yotes and not being able to kill some. Maybe your volume is too low and they can't hear you, are you using any kind of a decoy ? are you sure your wind is right always call into the wind but watch your downwind side, try using different calls on the same set-up until they notice you, they should be pairing up about now so try a challenge call before using the electronic call, I've had great luck with grey fox pup or coyote pup calls.for black bear use the bear cub in distress call.how long are your setups ? I generally call from each setup at least 30 min and then wait about 10 min quietly to see if anything is sneaking in after I stop calling. I've had them come in from 1/3 mile away so if you can see them then they've probably busted you already, are they barking and yipping from a long distance, if so then they are letting you know that they know something isn't right, I'd appreciate knowing how you make out, e-mail me at [email protected], Bill