I am sorry to hear about your loss. I occassionally attend that show (and others in the area). It is very upsetting to hear about this since I have a decent collection of animals that I plan to bred someday and when I do, I will be hopefully vending at that show (in the next year or two) to sell some offspring.
One thing I always notice at these shows is the amount of people wearing backpacks. Usually younger people but regardless who has them, it can still be seen as somewhat suspicious. Bags, boxes and other items should be checked for that reason. Its simply too easy to walk out with stolen animals...and I only assume this b/c I have gone into shows with an animal on occassion to do a trade. Most shows don't allow people in with animals but almost anyone can get away with it. In fact, I recently joined Sams Club and everytime I leave, they check my receipt. Maybe the show coordinator should require that vendors provide a sales receipt to make it more legitimate. This way maybe someone could check people out as they leave the show.
Anyway, I have always read about theft at shows down south but never in the northeast...its really quite a shame. Good luck with recovering your animal....be sure to check the classified sections on the main herp websites...b/c yes..people can be that stupid. Also, do you have a pic of your animal? maybe this could be used to help others in id'ing your snake?
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Sincerely, Jason
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My Website: www.members.aol.com/northeastsnakes
My collection...