For me, it would all depend on the dog itself. If she seems nervous, I wouldn't bring her, I'd probably skip the show.
If she is a hard charger from the get go, I'd probably carry her. When we got Sabo from his "breeder" we went strait to PetCo (didn't think it through, but I didn't have a harness for a puppy, didn't have puppy food and didn't have a leash! I wasn't ready for him to use Metro's things as they were still "sacred" to me)...I had a blanket in the car, so we draped the cart, and put him in. Then it was daily trips to PetCo/PetSmart just for him to get out of the house---and always the same way, blanket in cart, dog on blanket.