Took the buoy mentioned below out to the local pond and tossed it in. The anchor line is about 6 feet and to judge by the movement of the buoy the lake is only 3-4 feet deep 20 feet out.
The wind was pretty strong, about 7-10 mph blowing straight in at me so the trap was immediately surrounded by a cloud of bugs. Unfortunately all the usual wildlife was hanging out of the far shore so the beetles slowly blew to the near shore. After an hour or so a lone duck came by to see if I'd feed it. I tossed it a couple of beetles and it quickly found the washed up ones. An hour later the duck and all the bugs were gone. Looks promising so far.