Upgrading Tickets

[yngsj]

We leave on our DL trip in 9 days and due to extending our trip by a couple days we want to upgrade from a 3 day hopper to a 4. Do we have to do this before we use any of the days of can we do this on our last day? Also, is the ticket both where I would go to do this?

 

[pixiewings71]

You can do it on your last day of use, go to a ticket booth anytime during the day (no need to wait in those big huge lines in the morning) and you can add a day.