Salvaging/Storing old Wormy Chestnut

I have run across an opportunity to salvage some old wormy chestnut from a long-abandoned family house. I'm not touching the structure (what little remains), simply trying to recover some of the siding.

My question is, what's the best way to store this? Unfortunately, I have no indoor storage for this amount.

I was thinking of storing it outside on blocks, with stickers between the layers, but I want to make sure I'm not destroying the lumber.

Is that the proper way? With or without tarp? No stickers?

Much appreciated.