Pick up my 3 buckets &4 lugs of fresh Calif grapes yesterday. After the 2 hour car ride the buckets were fermenting by the time I got them home. Bucket said sulfites were added. Plan was to add a 1/2. Lug of grapes to each bucket. But with them fermenting I'm not sure. I Added wine yeast to the buckets. De-stemmed & Crushed the grapes, sulfites to 50 ppm. Waiting till later to drop yeast. So do I add some of the fresh grapes to be he buckets? Or ferment separately, then blend later. Guess I'm worried the wild ferment in the buckets will affect the flavor of the fresh grapes.