I'll and a picture tomorrow, when I'm home during the daylight. It's nothing fancy, just 1/2 conduit and vinyl sign material we scored for free. Sure is doing a great job keeping the coop dry and stopping the worst of the winds. I haven't seen any snow or rain getting on top of the nesting box, but that does need some work. I can barely reach the eggs. Thought I'd make it a double decker nesting box - make the roof slanted and permanent, and access the eggs from the side.
I'm thinking humidity is not a problem right now. I've been removing the poop from the sand every night, and it's 0% humidity right now! They are not huddled together - more spread out if anything. And puffed up. I'm worrying too much, but I'd feel awful if they got frostbite!