dont know if you have this in yer thoughts, but if you put a row of cinder block around perimeter and build yer shed walls off those you significantly raise the level of wood from ground level helping to keep bugs, moisture etc. from messing with siding. extend those bolts through the cinder blocks, mortar in the cinder blocks, and away you go. thats what i did on my shed (w/ neighbors help), and really glad i did it.
