This is what we saw on our way in to the 20th annual <a href="http://herbalaffairandfestival.com/">Sand Springs Herbal Affair</a>, the kick-off of Tulsa's spring and summer festival season and one of the first sources of the year for gardening supplies, Tulsa arts and crafts and locally grown plants, produce and other foods, yesterday afternoon: Every street within a few blocks of the festival lined with cars.