Cory,
I have no direct experience with guns in a salt water environment but will offer my ideas. Rig Universal for the metal parts. It has the consistency of thick, sticky grease. Wipe the metal parts down good with it. I would wax the wood. When you're done hunting I would wipe the gun down good with a soft, dry cloth or two to get any salt residue off followed by a complete wipe down with Ballistol which won't harm the wood. Depending on the weather/salt spray conditions a strip, clean and oil may be in order when you get back home.
Good luck and have a good hunt.
Phil
