We are going in the fall and want to take advantage of the ticket offer (get 2 days free), but we don't know how many days we want yet (6, 7 or 8 total) or of we want the park hopper (depends on park hours). Called member services to ask if we could upgrade the ticket in the future to add days and or park hopper and the answer wasn't clear at all ("I think", "I'm pretty sure"). I tried to find the fine print on the tickets with no luck. Anyone have experience with the promotion and upgrading?