If you're looking to spend some time checking out the Disney transportation, take a ride on the boat that runs between the MK and the GF. It's a beautiful boat and a nice ride over and back. And, if you've never been to the GF, take some time to check out the hotel lobby and the grounds while you're there because it's such a beautiful resort.
Two other nice boat rides are between the TTC and MK and between the MK and WL. That will also give you a chance to check out the lobby and grounds of WL, another wonderful resort.
As you can tell, my DH and I like exploring the other resorts. On our last trip we spent one of our non-park afternoons riding around WDW and exploring a few resorts we had never seen before. Between the resort touring and all the boat and monorail rides, we had a really fun afternoon.