The last few times we have been to F&W we have been forced to visit during weekends. The lines are quite long, but to be honest, they move REALLY fast. The walkways are crowded, and eating can be tough if you need to use a fork, but it is a fun atmosphere.
It is a food and WINE festival. There are going to be folks who consume copious amount of alcohol, the vast majority of people are well behaved. If this is something that folks want to shield themselves and their children from, than MK is an excellent option.