Whatever event you go to, I would recommend going to one ofthe practice rounds, especially if your son likes to get autographs. Maybe a Wed-Thu so you can see one practice round and one real round.
The crowds are far smaller, the players will joke around, and I find it a great way to see the course.
In my business I am offered passes to many tournaments, and I always ask for practice rounds, then watch the event (especially Sundays) on my TV!