OK, as for storage of the buds: in time, you'll want to get mason jars (We have a place around here called World Market that sells tons of sizes for an average price). They're just airtight glass jars. Until then, keeping it inside a baggie in something like an altoids case will work fine.

Now, as for stash spots: If any family members ever get suspicious, they're going to go looking in your room for evidence. If you can, avoid stashing your stuff in your room. I have a basement with lots of boxes in storage: It's easy to hide something down there. However, should you not be able to stash it outside of your room, within a ps2 or a computer (Should there be no one who ever looks through these things) is your best bet. Places like closets and drawers are obvious red flags, parents go there first.