On our first DW trip we stayed on site and used the buses. It was a looonnnggg walk to the bus stop every morning and another looonnngg walk to the bus at night, and then a looonnnggg ride to the park. If we stayed for the fireworks, the buses were packed and we often didn’t get a seat. Add the charm of crying babies and whining, tired kids, and DH remarked that if there had been a crate of chickens on top of the bus, he would have sworn we were in a third-world country.
Then Disney served DGS food containing one of his allergens, and he had his first anaphylactic reaction. We Epi-penned him and the restaurant called an ambulance. DSIL was the only one who could accompany him to the hospital because it would not have been safe to transport his baby brother. The restaurant staff graciously escorted us to a lovely spot outside the restaurant, close to the garbage bins, in August heat. And there we stood for over an hour, not knowing if DGS was alive or not while Disney scrambled to find a car with an infant seat for DD and DGS2. When we were picked up, we were told they would arrange transport back to our resort. Several hours later, when the hospital released DGS, no one had any knowledge of this transport. The hospital was very helpful and also found a pharmacy that would delivery the necessary drugs to our resort.
So, no, there is NO way we will ever not have a car at DW.