You mentioned the Gilroy festival well the Hudson Valley Garlic festival in New York is pretty good but expensive. I would plan on going back but the $10 admission is too steep. I see Deadwood South Dakota has a festival with some big name 60s bands and I think it is free. We plan on going when work allows. Locally here in northern Ohio there is a Duck tape festival that is different theme but small with typical food, The North Ridgeville corn festival is small with the typical food but sometimes brings in older 60s top bands, both are free admission to everything