I think you will be fine without a car, but if you decide to get one, there is a car care center near MK where you can rent, another at the Swan or Dolphin resort near Epcot, and a few at Disney Springs area hotels. This will save money vs. renting from the airport which is more expensive, since you will have DME to transporting you to and from the resort at no extra cost. This is also helpful if you decide you want to rent a car while you are there. You can also check Mousesavers.com for rental car coupon codes for various companies, and the transportation board on here has a thread on the locations/companies that rent on property. For some, it is just the convenience factor of having the car to be able to come and go when they want to, not have to wait for bus, and possibly stand on a more crowded bus. But we have generally found bus service good, and buses do drop you right at the park entrance, which is nice, instead of walking from the lot/taking a shuttle to get to the gates. If we can avoid extra costs, it helps make more vacations possible! You are also going at a slower time of yr., which should help. If this is your first trip, it will be hard to know till you try it. You probably want to request a room that will be close to the bus stop for a shorter walk, especially coming home at night when legs are tired! When we stayed at POP last yr., we payed a little extra for preferred room, to be able to request one closer to the front where the buses come, as well as he food court. You can check out the AoA thread on the resort board(if you haven't already), where they should have a map and info. on what areas are going to be close to bus stop, pool, etc. and you can ask others who have stayed there questions.
