If you have 6 web-browser enabled devices and a computer you can create an ad-hoc server and run
roboscout_2016. It's a great platform that creates a detailed analysis of teams (specifically, which defenses they have successfully crossed the least). It's definitely worth your time to check it out.
At our competition they have wifi in the school, so we run the web server on a rpi and connect iPads to it. But if you have a computer you can create an ad-hoc network and do the same thing easily.