Going both nights is encouraged! Practice was he shows you the first night and come back the second night to see how your doing. These guys that have been on the road and working everyday to improve the game they make a living at have a very different outlook on how they go about throwing with accuracy and practicing. Ken "Tank" Franks did it for years and is a great one to pick his brain in town if you get a chance to. They have little things they do that when your taught they seem so simple you should have recognized them yourself, and some people in town already do these things and thats why they are successful!
Hope to see you all out there at least one of the nights!