Forks can lift and "organize" a pile of slabs, especially on a pallet, and a chainsaw could cut them in usable lengths over an open tote, or tote frame. As you say, it is all about how you want to organize or spend your time. If there is a local market for the wood, it might be worth the time.
If you do go the composting route for the sawdust, I would suggest spreading it out so that it is only a few inches thick, or it won't get enough air to decompose / compost quickly. Adding something rich nitrogen rich will speed the decomposition up. I have tilled it into garden beds for things like roses and blueberries that prefer acidic soils, and it works wonders in trenches for potatoes, once it has composted.
Some folks use sawdust as bedding in cages and stalls if it is dry, but walnut sawdust is a huge (often a lethal laminitis) problem for horses.
Great to see all the progress!
All the best,
Peter