People drove and flew from all over the Country to Santa Rosa to try the very limited and fresh batch of Pliny the Younger (triple IPA) from Russian River brewing. I've yet to try it myself but it's supposed to pack a punch, bitter but really smooth
I'll be out there the 16th & 17th for Pliny The Younger. Russian River Brewing Company has some good beers.
Drake's Hopocolypse is good, that's a double ipa. They had a Hopocolypse Black Label, it was their triple ipa that was awesome, I believe that they already sold out. They only sold 2 bottles per person.
Dust Bowl Brewing Company is good, they have their ipa Hops Of Wrath and they're douple ipa Sons Of Wrath that are good. They also have some good Stouts.
If your willing to trade with people from the Midwest or East Coast anything from Founder's Brewing Company, 3 Floyds and Bell's are always good beers. Oh and can't forget about Heady Topper(I think Pliny The Elder is better).