Assuming nobody else is at fault

I spend a lot of time on public transport and was hoping to use that time to work on my campaign, but unfortunately it's not really practical to use my laptop on the bus. Any suggestions would be great!

I'm planning on running a gameshow/tournament style one shot, which would mostly be PVE but would end in a PVP style battle royal. I was thinking there could be different opportunities for individual players to earn gold/points to spend at an item shop before the final match, to balance out the classes and add some fun to the mix.

Fortunately (or unfortunately) I have not had to play with a 'that guy' yet, but I love the stories about them.