It is likely that it was on a small lake somewhere casting for bluegills. Early summer is the best time of year for fly-fishing on the lakes in the Grayling area. If it is trout that you are after, they surface feed on small midges in the morning and evening. If you time it right, you can have great success during the emergence and spinner-fall of Brown Drakes and Hex flies. These hatches generally occur on lakes just before they occur on the rivers.
Early summer is also the best time of year to catch bass, pike, and panfish on a fly.
This is the time of year for spawning and the fish are in the shallow water sunning themselves, feeding, and preparing to spawn. In addition to their voracious appetites, they are rather irritable, making them particularly vulnerable to a well placed fly. There is really nothing like the violent and explosive strike of a large northern pike when it decides that your big gaudy fly will be its next victim. The ideal spots for bass and panfish are evident when you find an area in the lake that shows signs of bedding fish. Poppers and rubber spiders are all that are needed to catch these fish consistently.