(game of alts, anyone?)
They could be store in:
(chose as many as you want)
- bags/barrels
- buckets
- stockbins
- a new kind of storage
OR, to make it much easier, they could actually stack!
Yes, I said stack!

Now that I think of it, there is no reason they should not stack.
Why, you ask?
Ever harvested like 10+ timber piles?
Or planed more than a few boards in one go?
Ok, some would say, just throw them away, but you need them for the fields...