the 2x4's help a little, but not much - IMHO as far as limiting ground moisture. Visit the "wood shed" forum for some tips on storage.
A gravel base and pallets would be the next possible step in helping the wood dry more efficiently. Pallets are free if you ask at the right place, and a couple cubic yards of #4 stone is cheap. Labor to move and tamp the gravel is the toughest part of the job.
A gravel base and pallets would be the next possible step in helping the wood dry more efficiently. Pallets are free if you ask at the right place, and a couple cubic yards of #4 stone is cheap. Labor to move and tamp the gravel is the toughest part of the job.