I just got back from the opening weekend, and sadly can say this was first time I've ever been in a Disney park that was teeming with people acting like loud, drunken jerks. I'm from New Orleans, so am pretty used to seeing this kind of behavior during Mardi Gras, but seeing it at Disney totally took me by surprise. People were tripping over strollers, pushing little kids out of their way, and, as others have mentioned, wearing shirts that said, "Drunk 1" and "Drunk 2"- totally not the Disney family atmosphere, imo. I didn't even bring my kids, and I still left the park four hours early (despite really wanting to see the fireworks) just to get away. Sorry, but as much as I love, love, love Disney, and have been going regularly for 37 years, this was my first and last Food and Wine Festival.
However, since I'm not a regular Festival-goer, maybe my experience was because it was the opening weekend, and your weekend will be much less crowded. I can say that if you want to stay away from the flat-out drunk folks, just avoid the food booths entirely- or maybe have one parent get food at the booths and have the other parent wait with the kids at a quiet spot in each pavilion, since the heaviest and loudest crowds were on the footpath around the lake. Hope that helps!