as stated the finish is the key to woods sensitive to moisture,, I have heard Jay Massey would keep his sinew bows in a tube with those packets that wick moisture on camping trips,, I think if you live in a very humid area,, using woods not sensitive to moisture is a good idea,, but if you have a favorite bow that is hickory,, then keep it dry when not hunting put on a good finish and it will do the job for you,, if seeing hard use, ,re finish every year or so,,, I will add that there is a big difference in shooting a bit outside,, and camping hunting in the rain for a week ,,, as far as the bow taking on moisture,,