Laser levels are a total game changer for that kind of work. I borrowed one from a buddy on a big fencing project and saved hours of hassle. You really can't go back to the old way once you've used one.

Good tip about the painted markers, but they're not always paint. Sometimes it's just a small carved symbol or a metal tag nailed up. @ericjackson is right about sticking to official paths, but even those markers can get faded or fall off. Always carry a real map as backup, not just your phone.

you said you could barely see the lower screens... but that's kinda the point of a busy show. It forces you to move around and engage differently. I went to a projection mapping event last month where all screens were eye-level, and it was just as chaotic. The crowd became part of the art... blocking views made you focus on what you could see. Changing the layout would kill the spontaneous vibe these nights have.