I have used DrCrhronic, Nirvana, and BCseedking, and all three are reliable...(yes to the US). Out of these three DrChronic has the biggest seed bank, from most of the top seed companies...Nirvana was the quickest shipping (7 days from time of order to my door), followed by DrChronic (10 Day), and BcSeedking (21 days and they are in Canada, but you get free seed, so no complaints here)....These days do include weekends, and shipped to the west cost of the USA and all three where very stealthy.
I keep my seed in a light proof and air tight containers in the refrigerator "not the freezer"

I would not hesitate to order again from any three of these companies.