Based on the above, be careful to include the "resort fee", which can vary from nothing to $20 or so a night. To me, that's just a quiet way to jack up the rate, making a $75 room a lot closer to $100. The Holiday Inn mentioned above has a $17/night resort fee. I didn't see the half off offer, but that could be in the Mousesavers newsletter. It may be that the Holiday Inn has better shuttles than some, but staying anywhere off-property, I'd highly recommend renting a car.
Edited: The half off resort fee at the HI is in the Mousesavers newsletter and some rates are as low as $59...but, I still recommend renting a car.