Go back there with a metal detector and I bet it is still thereback in the mid 90's while making a deer drive with a gang of hunters in a swamp I LOST my stainless Steel Ruger 44mag. It apparently fell out of the shoulder holster at some point in the swamp. We looked for it a few times days later but the rains came and the area soon was under water for 90% of the time. That one hurt.
They do make floating gun cases these days.The canoe we built this summer is specifically for accessing a section of public that I hope is overlooked this fall, I have a great fear of losing my rifle in the water. Planning to take it in the case with a life jacket strapped on to avoid this very thing.