Since its for next season, then take advantage of the three in front of you:
Get it out, off the ground(on pallets), in single rows or well spaced double rows. In the full sun, full wind exposure to remove as much moisture as possible.
Come September, put a lid on it, like some tin(corrugated roofing), even used from a local steel yard(its dirt cheap if used).
A tarp is okay, but since it doesn't breath, avoid any overhang more than 6".
If you can put pallets on top of your wood stacks, then plywood, then a tarp, you will have coverage, and airflow to prevent any excess moisture from hanging around.
If you put a tarp or just get a cheap roll of 3mil plastic to put on the ground first, then pallets, then the wood, you'll eliminate a large portion of your moisture sources.
Sun and wind are your assets.
Once you've had a ' killing frost' then bring in your wood as you see fit, but allow at least one week for the wood to thaw out indoors to get the greatest benefit. If you want to see this phenomena, just bring in a piece now, and watch it every 24hrs, its amazing how much atmoshperic moisture comes out in 3-5days, and how many more btus you will realize when you let it sit.
Good luck with this.
In the future, try your best to have one seasons wood spare, and one in the ready.