With repsect to release of captive hatched snakes, I was involved in a MA F & W head starting program with black ratsnakes. Not only were these snakes hatched out in captivity but they were held over the winter to grow them to increase their chances of survival. I am a breeder of ratsnakes, both new and old world species. The biologists provided me with protocols to prevent cross contamination of the head started obsoleta. Basically if you separate the release animals spatially (different room), practice normal hygeine and isolate the feeding and cleaning equipment you should be fine. Most states allow for release of wild caught eggs but check with the regulations posted by your state's Fish and Wildlife Agency just to be sure.
>>These are your animals, and you are going to determine what your going to do with them, but please don't release them. They have been exposed to possible captive pathogens that have the possibilities of harming wild populations. I don't want to sound like I'm preaching, but just consider that fact and decide where your going from there