Given the gun is going to get beat up in cold weather I would get Mossberg 500 with a beech stock. The reason I selected beech is synthetic stocks do make an unnatural noise when they bump into something. You are going to be in a blind...You will bump the gun into the blind.
Don't worry about scratches on a beech stock. Old English scratch remover will keep a beech stock on a Mossberg 500 looking like new. In fact, I recommend giving it a coat of Old English before you even shoot the gun.
The Mossberg 500 has it's place in the most reliable gun ever debate. The most reliable gun ever debate is soon to start. By nature pump shotguns are very reliable. The Mossberg 500 is the only shotgun to pass a military trial.
Nevermind the wiggle in the forearm. The forearm is riveted so it will not bind up. I have fired a Mossberg 500 with the receiver stuffed full of snow (not intentionally), it functioned perfectly. After 100 rounds you should not have have to pull back on the forearm, recoil should push the slide back.
A Mossberg 500 with a 28" vent rib barrel will include a full set of chokes. The 500 is one of the few shotguns with two extractors.
I can go on and on why a Mossberg 500 is the best shotgun ever made.