We will be visiting Vaison in May for 3 days and we are considering getting a cab to a local village for wine tasting and lunch. Although we will have a rental car with us we do not want to worry about driving on small unknown roads when we are enjoying a few glasses of wine. We are considering going to Gigondas and Cairanne. Are these good choices for wine tasting options? Is it practical to consider taking a cab and are they expensive? We are 4 adults.