I have seen ones that were at least close to adults. I didn't really ask to know if they were actually considered adults. I'm not sure how often this happens. I have only been to two.
Yes they do, but it does depend on the show. Some don't feature many tortoises at all. Have you consider ordering from an online source. Tyler is a friend and forum member and he sells them. Click here: http://www.tortoisesupply.com
Where are you from Payton ? The reason I ask in Mesa , AZ we have a reptile show in the the 3 rd week of Nov. and they put out a list of dealers and you contact them to bring the adult to the show . It's just a thought . Good luck with your future pet