Just a thought: Once you have your seeds in bags or what ever you choose and they are very dry-store the whole works in one of those luggage suction type bags. They come in all sorts of sizes and they are fabulous for shrinking everything by taking the air out. That would help collapse the packets for seeds, remove air (preserving silica) and if you want to open them you can simply reuse them again by taking the air out with a vacume hose again.
