[compuwiz12]

In my experiences as head scouter I've used wifi (before it was banned), ethernet, and the cellular network.

Wifi is optimal but that is no longer allowed for obvious reasons. (if you've been in the pits you cannot have missed the "Please switch all bridges to bridge mode" announcements.

Ethernet can work but it quickly gets really messy, especially when you start running power as well then move laptops around. Ethernet cables also fail pretty easily especially solid pvc ones.

We had the best success with a custom web app I built so it'd work on windows phone, android, iPhone, and the like. That's what I'd recommend, most kids have some sort of internet connected phone these days.