I haven't been to a festival sober yet - but I'm pretty sure I'd find it depressing as well. Not depressing in the "I can't join the fun" way, but more in the "what a sad thing you all have to get drunk in order to think you're having fun" way.
I had a momentary craving when out to dinner last night - the place we went is a place where I've enjoyed their creative martini menu. But it passed quickly. I stuck to iced tea and club soda, and that was just fine. I do wish more restaurants would have a menu of tasty mocktails. I went to one place for my 90 days that had an impressive list of delicious ones. I really enjoyed that.