You do have to keep the soil very moist. Most of the poppy seeds that you can get, like cannabis, have been bred in very specific conditions. Greenhouse conditions, usually. Therefore, they like a lot of moisture and they aren't nearly as forgiving as pot plants. You have to acclimate them over time. If you're worried about letting them dry out, rig up some sort of humidity canopy or tent. That should keep the soil from drying out. Once they start to develop, you might want to sprinkle a layer of dirt (or better yet, 50/50 vermiculite) around the plant to keep it in tip-top shape.
Out of curiousity, where did you get your poppy seeds? It's a bit hard to find ones that aren't irradiated or sterilized.
And Wigmo... If they're actually viable, then yes, they're probably the right kind. The poppy seeds you eat on buns and whatnot are indeed [often] the same variety you get the dragon from. That's why when you eat them you test positive for opium on standard drug tests... Because they do contain an infentesimle amount of opium (and other alkaloids like morphine). If you're not looking for a smoking product, you can cook up a batch of opium tea from a bunch of seeds. I've actually tried it before, and it works like a dream. Just be very careful when you do it, because it's pretty easy to overdose if you're not sure what you're doing.
~Will
Oh, and I don't think I need to say it, but don't chase the dragon too much.