Is there any kind of shelf life timeframe on keeping storing crushed grains prior to use? My LHBS is a 30 minute drive in good traffic, so I try to make my trips worthwhile. My current brewing schedule allows me about 1 brew day per month, so I was hoping that I can pick up the ingredients for 2 separate batches at once. So I guess my question should include hops too, and I should probably be more concerned with those. Will the grains be fine indefinitely if they're just kept in a well-sealed ziploc bag or airtight container and kept dry? I figure that you can keep oatmeal in the canister for a long time, so the same would apply here. But for pellet hops, can I just keep them in the fridge in the little ziploc bags they provide me at the LHBS for an long time too? It'd probably be 4-6 weeks between purchase and use. Thankfully, the commute will be irrelevant soon, as said LHBS is opening a new location only 10-15 minutes from me in September.