generally heat & light are bad for long term storage of any tryptamine. The best method i've come up with is scraping the stuff off of whatever you recrystalize it on and put it in some tinfoil, fold that up and put it in an airtight plastic container with desiccant in the frig or freezer. never had any problems storing it that way. If you've got amber reagent vials those work pretty well too, but like you said, its hard to get all the stuff out of there. One can wipe some reefer or other smokable plant material around in the bottom and get most of the stuff though...