Replying to HELP party theme

Our college ski club is taking 400 people on charter buses from San Luis Obispo to Telluride, I am on the executive board and I need to think of theme for the bus I am commanding. The themes the other buses have so far are: 80's American Gladiators, Pirates & Mermaids, Tye Dye Team, and What the Fuck.

I was thinking about changing out the lights in the bus to UV lights and having a highlighter theme, but half of our trip is during the day so that won't work.

Possible ideas:

Mardi Gras
Gapers: Summer vs Winter
Rumble in the Jungle
Cops & Robbers

help me out here, i'm terrible at themes