Absolutely go. It's a good experience to see all the equipment used in a pizzeria, and see where the big guys buy their ingredients. They even have a few vendors that sell things like pizza peels, aprons, screens, pans, pizza cutters, etc. Go rub elbows with Tom Lehman the dough doc., watch the pizza champions and more.
My wife and I went for the first time last year. We really enjoyed it. The only thing we didn't enjoy was the energy drink booth. The booth babes were cute, but the drinks stunk.
We preregistered as ourselves. No company name. So you should not have any problems.
Also go with an empty stomach. You will be able to sample so much food because the show is so short and the vender's do not want to take anything home. So enjoy.