I'm experimenting with a low-tech storage method using a humidification technique I learned from people who grow mushrooms indoors. I bought a huge, lidded bucket made of food-grade plastic from a beer-brewing supply house and filled up the bottom 3 inches or so with wet perlite. Perlite is a gardening soil material, basically a type of volcanic mineral that is very porous and wicks moisture into the air very effectively. It is cheap. On top of the perlite, I placed a bunch of ceramic items that I'm not using, and then piled up puerh cakes on top of that until the bucket was full. At the top, I put a small, digital device that measures temperature and humidity, and I sealed the lid over the top of the bucket. There is a small hole in the lid, but I've plugged it with a broken bit of cork from a wine bottle. Then I set up a small, office-type space heater about 1 foot away, aimed at the bucket, on the low setting. This setup was very inexpensive, and very easy to make. I did this about 2 weeks ago, and upon opening up the bucket and checking on things, the temperature read 82 degrees farenheit, with humidity at 84%. There was no condensation visible on the sides of the bucket, but that would probably be something to watch out for. The fragrance coming out of the bucket, when opened, was very strong and smelled good to me.
I know I'll have to add more water at some point, but for now I think I'm going to just sort of check on it once every week or two.