I don't get bulk grain, but I use the food saver to vacuum and seal leftover DME, adjuncts and hops. Someone has pictures of how they foodsavered 50 lbs. of grain.
MATT - 65g in 2k8
3rd Circle Brewery
Ferminatin' - Route 666 Pale Ale
Figurin' to do - Oatmeal Stout, Gueuze, Belgian Blonde, Mild, English Pale Ale, Weizenbock