Why even call the GW if you don't want them on your property?
And, I do not understand the whole concept of the line of thought on this......you had rather the trespassers be there and hunting and MAYBE you run up on them as you hunt these 3 bucks. BUT, you are worried that the GW's presence might spook the bucks off the property.
Really??

The GW probably thinks like I do. "What is this guy hiding?" LOL
He does not need your permission to enter the property. And, I fully suspect that he will.