Even if you pulled this off, you would be sooooo wasted you may (potentially) not notice that your sound card is not plugged in. Then there's the issue with the fact you (potentially) forgot your laptop charger (suprise suprise!) and then there's the whole dilemma of no PA system.
It's all the advice I can give, because its all I use.
I don't have to look at my laptop at all; I set up all my instruments up as different tracks and scroll through them easily using the d-pad on Push. I find launching clips and playing alongside them using Ableton Push very easy ...