So many thoughts, so little time... Judged=clean everything including under the car and the wheel wells, and have a fire extinguisher somewhere in the car visible to the judges. Hood and truck must be open. Points are for cleanliness, and in stock classes, points will be deducted for non-stock pieces. Participant voting=make the top side look nice, the more bling the better chance you have.
Make sure you are in the proper class for your car. My "to bring" list for a judged show: quick detailer, towels, tire dressing, plastic protectant, glass cleaner, trim detailer, canned air (to blow dirt out of creviaces), lint roller (to "vacuum" the seats/floors). And don't forget sunscreen & a chair, plus something to drink-shows get real long if you're sitting on the ground in the hot sun baking!!