Can anyone offer advice on the best (or cheapest) way to purchase park tix when renting DVC points? We rented for OKW in December and were wondering if tix purchased separately either from the resort at time of check-in or from a third party source (i.e. the Disney Store, Undercover Tourist, etc.) could be combined into your "key to the world" room card like when we purchased a MYW package on previous trips. We liked not having to keep up with paper tickets for everyone that way. Thanks!