re: Making a dispensary run to CO, what should I buy?

As far as getting it out, edibles are easiest. Gummies are inconspicuous. I found a brand of THC in pill form called Altus which is very mellow and I was able to drop it into a vitamin bottle and take it right through security at DEN.

Flower is harder to get out, but not impossible.

As others have said, it won’t help you sleep much better. Melatonin and exercise is the best bet. I’ve had similar issues and found that a good workout helps immensely.