At the risk of bragging. Amy and I have managed to fill this wood shed since last spring when it was down to two lame rows of not very good sticks.

The shed is 30 feet by 16 feet and is built on a slope so height of the stack varies but 6 feet is the average stack height, I think. I call it 30 cords full.
We paid the guy who logs our timber to drag out 30 or so cull logs to a more or less level area in an upper field that is bordered on 3 sides by timber with easy access. The logs were all hardwoods. Elm, Hickory, Walnut, Oak and Hackberry.
This is much better than roaming the woods on my ATV with a trailer looking for logging leftovers to cut. Much easier to get to and more energy into breaking down the wood rather than figuring out how to get to it.
This is how I used to go out to get a load of firewood:

Anyway, we heat with wood exclusively and since wood is carbon neutral I want my carbon credits!
Not exactly sure what 30 cords of mixed hardwood equals in fossil heating fuels but it is a few BTU I am sure.
We use an 8 horse, 26 ton splitter, An 017 Stihl Chainsaw and a 280MS Stihl chainsaw to work up the sizable logs into stove wood. We built an access path to the wood shed that allow pickup access as well as ATV access. It used to be an off camber slope with grass so it was hairy getting to it with loads if wet or slippery it is a level gravel path now.
Don't get the idea wood heat is "free". It takes an infrastructure of sorts to do it. Saws transport, splitter, stove, chimney and hard work.
Wouldn't have it any other way.
Just wanted to brag, Err share.
Tom