First off, thank you so much for coming all the way from Florida! Second, good question. We are planning on having all answers entered on a device, but you might want to throw in a small clipboard just in case. Or a small notebook to use as scratch paper.
You should not need an external light, and we ask that you not use one. Everything is designed with the nighttime lighting in mind and you will be able to solve the challenges equipped with just your eyeballs.