Having a car is an absolute must when staying on property. My time is pricless so waiting on a bus and being subjected to people coughing, complaining, and or potentially standing makes the cost of a rental nominal. Factor in the ability to come and go as you please makes it a no brainer especially for those of us that venture off outside of Disney periodically to visit other sites or just have dinner on Idrive with no hassle of time constraints...remember its a vacation.