Food Storage Question

We like to buy in bulk, but then every once in a while we have an unexpected stretch of not eating at home as often, and things go to waste. Right now, we have some issues with insects (pantry moths) in our grains, and I was thinking that I might like to just get an extra freezer and keep everything in the freezer. Does anyone have experience or thoughts on this — I keep rice in the freezer, but what about flour, dry pasta, cereal?