While the subject's made allot of money for gun scribes over the years, the truth is (IMO) that if the wood is sealed as stated above, the action bedded (preferably with pillars), and the barrel channel has a generous free float (and I don't mean a dollar bills worth) it'll never make a difference in real world hunting situations.
Wood stocks are all I own, and trust me, it's plenty humid in No. Idaho.
I'll take wood over injection molded plastic every day.
JMO
Shooting your rifle at your destination is the best advice in this thread.
Simple common sence that shouldn't even have to be said.