PJ, I came across this statement on another BB. Can you comment?
All flour has weevil eggs in it, right from the flour mill. Freezing it will kill the eggs before they hatch, so no buggy flour. If you're not able to freeze it or keep it in the freezer, a couple of whole dried bay leaves will almost always keep the eggs from hatching. We freeze in common Zip Lock bags and keep some bread flours in the freezer for 6 months or longer without a problem.
It's not a question of keeping the bugs out, just keeping the eggs from hatching.