BiteClub dropped by the National Heirloom Expo on Tuesday at the Sonoma County Fairgrounds and ate through the ever-expanding row of local (and regional) food vendors with gusto. Top pick: We’re dying over Donna’s Tamales, made with smoked cheddar and chiles (available also at Community Market, 1899 Mendocino Ave., Santa Rosa). We were also loving the venison burger from Farmer’s Wife, mini bacon stuffed sliders from Conscious Cooks (Sebastopol caterers, 707-874-9581) and Real Cool ice cream’s Crane Melon and cream popsicles. Check out pictures from the expo, including gourd sculptures, the pumpkin tower, watermelons from around the country and the Internment Camp melon with a puzzling name we couldn’t find out much about