Not sure if there are any non-vendor competitions, but you never know, best bet is to e-mail them and ask. As for not doing the show, it may be quite helpful for you to come take a look at what everyone is doing. We jumped into the Fiery Foods show blind a few years back. It was quite overwhelming, but alas, I had cold beer during setup, so everything went fine. As for Zest Fest, for a couple of years, I would fly into TX on Thursday afternoon, hang out with everyone Thursday and Thursday night, come in to the show Friday morning, check out the booths, grab any collectibles I was looking for, and then fly back to NJ late Friday afternoon, as we had a charity event each year for a local fire dept. the following Saturday (300+ lbs of wings cooked up).
After a couple of years, they changed the fire dept. date so we got a booth. It was a lot easier setting up after checking it out beforehand. You can learn a LOT by just checking out the booths, they way people offer samples, booth styles, and an overall knowledge of how things run at the show. Your first trade show is always the scariest, as there are a bunch of unknowns. That being said, virtually all vendors are more than willing to answer questions you may have.