If you find yourself out drinking on the Dirty Six while in Austin I can recommend the Rollin' Smoke food truck - https://www.facebook.com/RollinSmokeATX/
I ate some pulled pork while sober and really enjoyed it... when I was drunk I indulged in the Playboy Sandwich... the ultimate late night BBQ food
Also if you after some good donuts in Austin Gourdoughs is freaking awesome. I only bought stuff from their food truck on 6th street but they also have an actual store somewhere in Austin.