But they are mainly geared toward the science of herpetology and conservation, more than toward hobbiests, breeders, etc.
See SSAR at:
http://www.ssarherps.org/default.htm
and PARC at:
www.parcplace.org
There used to be a group called AFH (American federation of herpetoculturists). They were the group that started "Vivarium" magazine, which I beleive was the first reptile oriented magazine, back in the early 80's I think. I beleive the group is no longer in exisitance. They had a huge packet they you could order that was specifically data for fighting legislation issues.