For information on handicapped accessibility, call ahead. Many places have areas reserved specifically so everyone can enjoy the show. Cameras are allowed at both the Trempealeau Hotel and the Ridgeview Inn, as long as they're not video cameras. If you're not sure if something is allowed, call ahead. It's a long walk back to the car otherwise.
Many festivals start in the day, going well into the night so dressing in layers is a good idea.
Drink plenty of water and get some shade to avoid heat exhaustion. Sunscreen is another must. Having comfortable shoes is also very important. When ordering tickets for events, you might want to take advantage of the will call window. Will call allows you to buy your tickets in advance and pick them up the day of show.