Took a 1X2 strip of lumber and put cup holder hooks a couple inches apart to hold my rats and always keep a fan going in the room.
That's the best way. it keeps them up and out of the way for mice, keeps them separate for mold prevention, and you can visually monitor them.
Do all furs this way, cept beaver, just adjust the spacing as required.
You can take finish nails, drive them in part way, then take a linesman pliers and bend them to obtain the "hook" part of law Dog's method.
Fan IN THE ROOM, not blowing directly on the furs.
You're in Northern Wis, my guess is this time of year humidity isn't going to be an issue, But if you're going to continue onward and upward in catching and processing fur, you might want to invest in a temp/humidity gauge for the shed. pick up some cheap fans at garage sales.
Good Luck.