If you are taking ME, i'd also go with a value hotel depending on what month you are going AP rates are $74.00 to 54.00/nite. If you are landing at 8:00pm you will not get to your hotel til at least 9pm. actually if your taking ME from what i've read, could be as long as three hours after landing before you get to your hotel
If renting a car, id consider offsite, (having gotten rooms for as low as 39.00), you can still get up early, have breakfast, go to the grocery store to stock up on supplies and still check in at bw by 10am. and be in the parks by 11am.
have a great trip