What do you all do with the fish guts, heads and tails? A fishery biologist I know says to just put them up on the bank out of sight and animals will get them in a few days. I usually have a fire to cook fish, so try to burn what I do not eat. Someone else says throw them way out into the water so bears are not attracted. I am not sure there is one answer. I certainly would not throw guts back into the water in a heavily used area, but in an area that may get one or two people per year, maybe that is OK.