A lot of the people that I worked with for Amfac for the three summers and one winter I worked did not have a car. Now, many will frown upon hitchhiking, but in all honesty it's a very common form of travel for park employees. The dorms are very basic. You'll share a room with one or two other people, probably with a bunk bed.
Many rooms have a sink and a shared bathroom or a suite mate situation with the bathroom.
The food sucks. The pay is poor. If you have more questions I'll be happy to answer them in detail.