Hi, The ground transportation is available to all guests of WDW hotels, if you've already booked with expedia and they haven't provided you with any details try contacting
https://disneyworld.disney.go.com/wdw/reservations/dme/index?bhcp=1 I'm sure they will help you.
If you haven't booked with expedia already I would check the historic discounts on mousesavers and see if your dates have been offered before. We booked room only, then ended up booking a discounted room with the standard dining package.
The dining package has some that love it and others that hate it. We loved, it meant that when were in WDW we didn't have to worry about extra costs (even though we'd already paid it

). It meant that we would order whatever we wanted instead of worrying about the cost at the end of the meal. Even my number crunching DH thought it was a good deal.
BTW on that point if you are 180+10 days out and you are a guest at WDW you can start making dining bookings. The web page is pretty good.
I worked out what parks we intended to be in and booked meals based on proximity to our planned parks. Sooo... booked an Epcot restaurant for Epcot days, booked a close to beach club meal for rest days etc.
We didn't park hop so we avoided the parks with EMH, as the EMH tends to make the park busier. We also booked a Fantasmic dining package, which I think you need to do by phone. This just gives you access to a predetermined area in the Fantasmic viewing area. Our meal (Mama Melrose) was great, we were sooo full we took our dessert to go and ate it while waiting for Fantismic to start. Sorry to make this so long winded, but I remember the massive amount of research I did for WDW, and it all paid off in the end.