As everything in these small towns is within walkable distance, a group can be dropped off and left for hours to explore at their leisure to then be picked up at some designated time 4 or 6 hours later. We find groups love the freedom and diverse options. Healdsburg and St Helena are optimal for foodies and restaurants, St helena has the best wineries, (no great spa). All towns have excellent wine tasting, restaurants (groups usually gets together for lunch), shopping, and bike shops with easy biking around town or into neighboring vineyards. If spa services and massage is important, Calistoga is the best choice as the spa there has one-of-a-kind natural thermal water pools, volcanic ash mud baths, and the ability to do simultaneous massages for 20 persons or more. The timing of massages could otherwise extend over many hours for large groups.