Which wineries in Russian River Valley have outdoor seating?
Spill lists 66 wineries in Russian River Valley that confirm outdoor seating. Walk-ins are welcome at 14 of them, and 39 ask for a reservation. A typical tasting is $35. The wineries themselves maintain the facts on 2 of these pages.
Is outdoor seating at Russian River Valley wineries first come, first served?
It depends on the winery. Many seat outdoors by reservation like any other tasting, and a few keep the patio for walk-ins. The winery's page says which, and weather can close a patio on the day.