All I can add is to prepare your guy ahead of time. Practice at home a little. Bathe and clip him at home. Do his feet ...etc.... Then when you get to the show all you have to do is worry about the last minute stuff on him. Then, you can relax more at the show and watch, visit, and learn!
Oh, and on your day of showing? Keep an ear open for when the classes are and how fast they are moving. This will give you an idea of when you want to pull your little guy out and start preparing him for the last minute "primping". Depending on how organized you are and how large the previous classes to you are, you may need to pull him out 2 to 3 classes prior to your's and start getting ready.......Just a little pointer.
It all comes down to timing at the end. You don't want to feel rushed, but if you pull him out too early to get him ready -- then you'll be standing around with him getting bored and irritated, which can backfire on you too. Just watch some of the more experienced people who regularly show and see how they schedule things.
You should do great. Above all -- use this show to learn.....and then just enjoy.
MA