I have smoked before WLS and after. I have not had a case of the munchies, but I also haven't had most of the same thoughts about food as I did before surgery. Food is not as all consuming as it once was. So being high is being high without the munchies (for me). I find that when high, it's also a lot easier to get more fluids in. I have not had alcohol since surgery, that was more of a trigger for me to overeat then pot was.