I don't think that you are allowed to do anything "legally" with wild game/fish that gets you something in return. How anyone would ever know is beyond me. I think the rule is there so people don't sell it maybe.

Even on WDFW's website they talk about how it is a good idea to give a farmer some salmon or even some steaks if you hunt on their property, I don't see how that isn't giving some fish/game for something in return.

Maybe someone who knows a lot more than I do will chime in if you are that worried about it.

Congrats on the nice animal!