I have since been storing my grains in freezer bags...in the freezer. A 1 gallon bag will hold 4 lbs. This makes it easy to pull smaller quantities so that the rest stays frozen. Is this a bad idea???
I suppose weevils won't likely develop in specialty grains that are kilned or roasted.
Forgot to address your question about freezing, and yes, storing any grain product in the freezer is a good way to eliminate stored food pests. 10 days at 0F will kill all stages including the eggs. Once they've been through that cold treatment you can move them to a sealed storage container without concern for them hatching out.
This is great info. This has been one of my main concerns with bulk purchase.
I buy bulk base grains for about $35 per 50lb bag. Well worth it. I store in Lowes white buckets with Gamma lids. I can get ~25lbs in each pail.
I also buy bulk hops. It's more than worth it. It's close to half the price depending on what hops you buy. I've got 16lbs in my freezer.
I do nearly the very same thing. I may buy a lot of 1 oz packages of hops however but I am doing some bulk packs. I'll see if vacuum sealing the 1oz amounts leads to loss of flavor, bitterness or aroma.
Normally I brew Spring and Fall. I brew maybe 7-8 x 5 gallon batches a year, so my grain needs aren't nearly that of people who are brewing 10 or more gallons at a time, and making who knows how much...well, let's not go there.
I usually make an order for a brewing season consisting of a bag of 2-row, and then the other grains I need and relevant supplies. If I forget something common, there's a wall in a big beverage mart locally that has beer & wine making supplies, so I can grab it there. This way I can make only a few online orders per year and minimize costs.