Need help drying (and maybe curing) outside !!!

-Soo, this year im having a guerilla grow in the woods ( growing 3 autoflowers:Auto New York City fem. ; Auto Nothern Lights fem. ; and a mistery autoflower and also have some reg. seeds from a friend from various strains all mixed up.)
-The thing is, i cant have them drying in my house or in my garage, so i was wondering if there was a way to dry them slowly in the woods with a DIY wood/cardboard box with plenty of holes for ventilation and rain protected?
-I must also mention that the spot im growing has 2 old abandoned tungsten mines with free entry to them, they are cold and not too humid not too dry and have some air circulation. But that shit creeps me to the bone and is super dark, long af (after all it was a mine so the tunnel is long asf and branches out into several tunnels from what i saw). Also that thing has no structure/supports is just clay kind dirt not even ceiling supports or nothing its all made of dirt walls, ceiling and floor (looks like it was all made with a stick it has marks on the walls of when they dug it years ago) so thats why i'm afraid it will collapse on me and i will stay there.
-Do you think i can use that mine as a rain free shelter for drying (since is cold and dark there an has a somewhat decent airflow) i could put my drying box there and then once its done put it all into paper bags for 3-5 days before curing in mason jars?

It could work, make sure when you harvest to check the weather a week ahead to verify it won't be too humid or rainy. Also try and put an rh meter in there for a few days and check it periodically to see how high the humidity rises. Also be fucken careful man those mines sound creepy as fuck I don't wanna see you getting trapped in there, also be wary of "gas pockets" where certain areas of mines can build up noxious gasses that will make you pass the fuck out and die, think I saw that on TV somewhere lol but still you can never be to cautious.

You could use a simple storage tote, the size of a few beer cases and a secure lid, make some holes along the bottom and along the top just below where the lid snaps shut. It will create a natural air flow, remove all the large leaves to reduce humidity.