Might be fun, but no. I decided that I I'm not really a big fan of beer festivals. I don't like crowds and I don't like to drink too much. I'd go if I could plan a trip around it anyway, but nope, I'm not going to make too much of an effort to get there specifically for the festival.
I will go to Zythos next year, since they moved to a bigger location which happens to be a 15-20 minute drive (30 minute bus ride) from me. And I do like the Hasselt Beer Weekend. You don't have to fight with any crowds since they bring the beer to you, and they do a good job of picking interesting beers.