It is a little out there, but I haven't seen a team use one of
these ... yet.
It would be pretty easy to modify it to include a couple gamepads, either nested on the side or velcro'd on.
I'm also a pretty big fan of going to the HW shop and looking at tool bags, like for carpentry, plumbing, etc. I'm currently carrying around a small Husky with a power strip, a DLink, a roboRIO, I think five cameras, two gamepads, a USB hub, extra cables and some "tools" too. It has internal straps and pouches and some external pouches as well. It is very sturdy and somewhat padded. It it the replacement for the modified gym bag that was falling apart. I am able to leave everything in the bag, just plug in the power strip, plug USB into my laptop, and I have a "robot".
Keep it small, light, and try not to drop the stuff that you need to work in the next match.
Greg McKaskle