This Saturday, I'm going to be walking in the Relay for Life cancer walk. I'm on a team and the relay part is that one of us has to be walking every hour for 24 hours. Because a couple members backed out, it leaves just several of us to relay it out and on average we're allotted 4 hour shifts. My shift is 1-5am. This is the shittiest shift in the bunch, but I know I keep weird hours anyway and I can function adequately with less sleep, so I accepted this shift without a complaint. However, it's going to be really late and it's 4 effin hours.
What essentials should I bring with me for that 4 hour duration? What would you bring?