r ransom wrote:Do the wasps like the burried wood or the surface wood?
They all seem to like rotting surface wood to make paper for their nests. The ground dwelling yellowjackets probably prefer buried wood since it may offer spaces that are easier to hollow out for their hives. I've seen them take over chipmunk nests in and under cinder blocks, in the same season that other colonies dig right down into hard clay only fifty yards away. I guess it's up to the queen to pick the neighborhood and furnishings.
As far as wood piles go, they offer protection for both kinds of nests. I have several piles around our place for firewood, potting soil and dead hedges. I approach them all with a degree of caution, expecting to find snakes, spiders and wasps - hopefully before they find me. The same goes for the blackberry patch: look before you reach.