Gravel is good.
We use to stack wood on gravel and it didn't get wet...picked up stones though. Now we pile our wood on gravel and they can get as high as Lifted4x4Astro's but there's no fear of a catastrophic collapse but occasionally 5-6 pieces will avalanche. The gravel lets the water pass threw it. What you see sits on gravel in the fall we cover it.
We use to stack wood on gravel and it didn't get wet...picked up stones though. Now we pile our wood on gravel and they can get as high as Lifted4x4Astro's but there's no fear of a catastrophic collapse but occasionally 5-6 pieces will avalanche. The gravel lets the water pass threw it. What you see sits on gravel in the fall we cover it.