I harvested some yeast last night from two bottles of this year's Oberon. It's already showing activity. I've had good luck the past two years harvesting their house yeast from fresh Oberon. I'm going to use this harvest to make a mango habanero beer later this week.
It's nearly impossible to check out all the great breweries in Grand Rapids in one day. I'd suggest planning for an afternoon snack or dinner at Brewery Vivant. They don't open until 3 on most days. The food is fantastic, and they have great beer options. Greyline is a new brewery that you'll...