I agree, had call and stick with cotton balls or feather, but not necessary. They will know where you are as soon as you start calling, the feather idea gives you a diversion though.
If you want to make a call, I can show you if you'd like, takes about 10 minutes of you have the "stuff"
You will need a 3-4" piece of 1/2"-3/4" pvc pipe, no trespassing/for sale sign, or similar thickness material (just need a piece) and a rubber band. Tools needed hacksaw or any saw in a pinch. Made bunch of these, not fancy but each one has it's own sound and will be new to the yotes.
Friends don't let Friends drink and post.......
The first 5 day's after the weekend, are the hardest....