I think the informative part is fantastic. I'm all for people learning about the animals we love so much. But bringing your animals to the store is just asking to bring something undesirable home, like mites.
It also puts the store and the animals in the store at risk. One person brings a mite riddled snake in the building and there could be a storewide outbreak.
If I were to attend, I definitely wouldn't be bringing any of my animals. And I'd treat it like an expo. Strip down before walking in the house and straight to the shower. I'd be too afraid of hitch hikers.