We let our 20, 3 year old vines produce just 1 bunch of grapes per arm this year....just to see what the grapes taste like. I harvested enough to maybe make a 1 gallon batch and froze them. Can I add them whole to my primary along with enough blackberries (have 40 pounds of those) to make a 1.5 gallon primary. I'd like to just add them to the mesh bag vs. trying to press the fruit for such a small batch. Advice? Thanks.