Police say the man was reported missing on Saturday evenung after going out for a boat ride on Obabikon Bay.
When he failed to show back up at his camp, friends and family went looking for him.
His clothes were found on a rock and his boat was found floating in the water a short distance away.
Police believe his boat may have drifted away and he went swimming after it.
Bill Amason is from Summerfield, Florida, but is a seasonal resident of Morson.