clkelley is correct. It doesn't matter with whom you book, whether it is room-only or package, or how many nights it is for. As long as you are named on the reservation at a WDW owned-and-operated resort, you are eligible to take DME between Orlando Int'l Airport and your resort. This can be done one-way or round-trip, your choice, but each leg must be on your day of check-in and/or day of check-out as applicable.