Years ago I did a Thread that mentioned my Growler. Five years ago, more or less, someone on the Forum asked to explain HOW it works and HOW to make one.
No, it was not Uncle Bob... but he and I are in the same facility... Airstream Lockdown.
Lets say you are at a crowded RV Park. Yellowstone is great. It works.
Lets say you are at a Boondock location with a loud party at Midnight. It works.
Lets imagine you have something that will give everyone... goosebumps at a crowded RV Park. It works.
This is it. Best is a five gallon METAL can. Popcorn used to come in them. I loaned Ray's Growler and never saw him again. My brother is like that.
Most everyone can get a Plastic Bucket. The bigger, the lower the Tone. A small one sounds like a Squirrel. A larger one a Rhino. Since you are in the USA... lets settle for a Grizzly (metal five gallon+ can) or just a Black / Brown Bear (plastic five gallon bucket.
The shoe lace or cord is important. Nylon and a half inch or wider for BASS. Smaller widths for TENOR. Some work better than others. The cords given with ID Tags are wide and Nylon.
Center the hole so the cord fits through it. Tie a large knot, or figure out something you may come up with. Knot the outside and snug knot on the inside the bucket.
The longer the cord... the longer this contraption works. Three feet from the bottom of the bucket to the end is a gooooood Growler. Experiment with options.
Wet the lace, cord or whatever you are going to try. Some are better than others. DO NOT LOAN RAY'S GROWLER to anyone. They will never bring it back. Remember my Brother? Yes...him. He gets Great Campsites just by Growling and waiting... It is already paid for, so go for it.
I include photographs at great expense to myself and the hired actress. I could not afford video with sound, so this is what you get.
If you have questions, please ask Uncle Bob. Maybe Thalweg. He likes Bear. Singular or Plural Bear, of course.
Try a coffee can. You can drive someone crazy and they will move their trailer, tent or refrigerator carton in the morning. Oh yes... they will once you get good at it.
Hunting Season... be a bit cautious. These can sound like a Bull Elk with telephone poles for a rack. These guys camp in tents, so you probably cannot use their campsite, anyways.
OK? Try it. Tell us how it worked. If you were beaten up by a crowd of upset campers... add a video. We all enjoy someone else getting all the attention. I am still in hiding...