Storing lumber at an off grid site

What do you all do for storing lumber outside? I’m currently building on an off-grid property and am early in the process of building my first outbuilding. I don’t have any permanent covered storage and have just been rigging a tarp across my lumber. I try to leave an air gap to let air run longitudinally and keep stuff dry. The lumber sits on some plywood which in turn sits on some scrap stickers. Does anyone have any better methods?

The moisture from the soil will affect the wood from the bottom, especially when it rains. Digging rodents will disperse the soil and throw it on your lumber.
I store everything outside.
Masonry and steel I just store on pallets.
Cements, insulating firebricks, adobe, lumber I store on double pallets or double pallets separated with plastic.

Cristobal Cristo wrote:The moisture from the soil will affect the wood from the bottom, especially when it rains. Digging rodents will disperse the soil and throw it on your lumber.
I store everything outside.
Masonry and steel I just store on pallets.
Cements, insulating firebricks, adobe, lumber I store on double pallets or double pallets separated with plastic.

What do you mean by “separated by plastic”?