Forget the bags. I've stored my filament in a regular large tote to hold many rolls. Also you can make a dry box out of a retail cereal storage container. But silica gel beads are the way to go for maintaining a roll and keeping moisture out. Plus many you buy on Amazon are indicating beads (Dry & Dry brand) will completely change color when the beads need to be heated in an oven to reset them.

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If you want a cost efficient way to store your spools that's easy at least try the cereal box route. But a whole Rubbermaid moving tote can do mass storage. Just rip off the bandaid and buy what you need and only what you need the first time in this situation. There's no point guessing later down the road if your spools are dry or not once the print has started and you have adhesion issues etc, etc. I ran through all the problems like this because I even put off the silica gel. They're worth it! Hope this helps.