If the beers below impress you, then by all mean go.
But if you:
a. detest crowds of drunk mainstream twentysomethings or
b. have better beer in your basement
then don't go.
Here are some of the beers that the breweries are bringing...
Smuttynose: Old Brown Dog, Finest Kind IPA
Victory: Headwaters Pale Ale, SwingSessions Saison
Devils Backbone: Vienna, Eight Point, Congo, Schwartz Bier
Troegs: Perpetual IPA, Troegenator Doublebock, Dreamweaver, Wheat, Hopback Amber
Widmer: Pitch Black, O'Reilly Rotator, Hef, Columbia Commons
Redhook: Pilsner, Audible, Longhammer
Kona: Koko Brown, Longboard, Firerock
Omission: Lager, Pale Ale
Goose Island: Summertime, Honkers
Shock Top: Lemon Shandy, Apple Crisp
Bold Rock Cider: VA Apple, VA Draft
Boulder Beer: Hazed and Infused, Mojo, Sweaty Betty
http://dcbeerfestival.com/
That has disaster written all over it.
it's a traveling circus. they do it all over, here's reviews from the LA one: http://www.yelp.com/biz/la-beer-festival-culver-city