The Mary Queen of the Universe shrine is the place to go for any Catholic Mass. My wife and I go there every trip to WDW. We arrive on Saturday and go there Saturday evening vigil. It is a beautiful place and is not far from DD, just go down the street with all the hotels on it at the end take a right then go under the underpass and it is your first left. It is on the right hand side of the street, you can not miss it. After mass there is a gift shop that you should visit, I don't think you will find many like it.