Humidity is definitely the silent killer when it comes to preserving premium genetics, so you're right to be paranoid. Personally, I keep mine in an airtight container with silica gel packs inside a cool, dark drawer, keeping the temperature stable. But honestly, a lot of it comes down to how you bought them in the first place. Good shops ship them in proper, protective original packaging. I usually order my collectible seeds from https://seedweed.pl/en/ because they have pristine storage standards before shipping, so you know the genetics haven't been ruined by heat or moisture in some sketchy warehouse. Once they arrive, just keep them sealed, keep the humidity around 10-20% if you can, and keep them away from direct light. No need for a fancy fridge unless you plan to store them for a decade!