In the book they give you the day you check in to your program, they will have a page devoted to what churches are around. The book even provides contact names and phone numbers.
As uttom said, Disney doesn't provide transportation, however if you can find friends who go to church you can hitch a ride. I know my church (Church of Jesus Christ of Latter Day Saints, aka Mormon) provides transportation as much as we can. Each one is different. I'm pretty sure there's a Catholic church within walking distance, if I'm not mistaken. And last semester I had a friend who was part of a Bible study group on Tuesday nights held in Chatham, I think.
Ask around. You'll almost certainly find a good church if you have your eyes open.

The hardest part is getting Sundays off to go to church.