Wet - I also load my rifle up and leave it loaded most of the season (weather permitting). Rain or wet snow will mess up a BP charge if your're not careful. If I am hunting in this stuff, I will shoot it off. Otherwise I leave it loaded. Right now I have a 45 caplock that has been loaded since October 31st. Its been dry so I have no doubt it will go boom.
If you camp mates object to you snapping caps. put a patched jag down the bore and pop off one or two BEFORE you get to camp. The patch will do two things. Contain and collect the fouling at the breach and verify that your flash hole is open. (you will notice a burn mark on you patch)
Then when you get to camp, you can dry patch and load up.