A few years back, there was a website (or maybe it was an App?) that you put in your home state, and the state you're travelling to. The website would then spit out a list of beers that you have in your home state that aren't distributed in your destination state, and beers there that you don't have. I've lost track of it now, and Google isn't helping me out, so I thought I'd reach out and see if anyone here knew of it. It was a user-supported thing, and maybe with all the brewery growth it just got out of hand to try to keep up.