It wasn't a topic of fair or unfair. I didn't see it specifically in the rules of the show, so I though that I would ask. Most of the shows that I have visited, or looked at their website, specifically prohibit the general admission guests from bringing in animals from outside the show.
As far as fair or not fair goes, I see reptile shows no different than gun shows. Vendors are there to sell their goods, at both gun and reptile shows, and, if allowed by the promoters of the show, the general admission guests are allowed to bring in their goods and walk the show in an attempt to sell/trade their goods as well.
The way I see it, it is up to the promoters of the show to decide the rules, and since the rule is not specifically stated on the website, I felt that it was appropriate and respectful to ask prior to attending, rather than showing up at the show making an assumption.
John