Yeah, I always have to be pretty careful when I've been drinking. If I've had too much my wife has to keep tabs on me. I generally bring extra diapers and boosters beyond what I normally do and I have a pretty good idea of all the bars on the Coast and in the French Quarter that actually have decent facilities to get changed in.
Worst case scenario I've got an extra pair of pants I keep in the car. The last time I had to break them out was actually pretty embarassing, didn't realize how close to capacity my diaper was when I got on stage to sing karaoke and ended up leaking while I was singing. I don't think anyone noticed but when I realized what happened I was pretty mortified, when I got off stage my wife brought me into the bathroom to get changed(due to spinal problems I cannot bend easily so changing myself isn't something I'm able to do sober, much less after drinking), and a friend of mine's friend who came down from college accidentally walked in on that scene and just the whole thing was a mess. Fortunately he was nice enough to not mention it, and I did not have the wherewithal to go through any kind of crash course on the ordeal. The friends may or may not have told him about it, I'm not sure. The night ended up being okay, but that was one of the more trying ones.