that works if i have a laptop with me. it's easier to use a tablet, and the touchscreen interfaces are intuitive. at RMAF when I've used a laptop you'd be surprised how many people will come up to the computer and say "What do i do.."
unfortunately, i have an iPad, and while you can use that with some DACs the possibility of using it with external media at the same time is very unlikely. an Android tablet, i bet it can be done.