Not on property, but Basilica of the National Shrine of Mary, Queen of the Universe is nearby. You will leave the property by way of DTD. Their website has very good directions with a map.
Saturday Vigil is 6:00pm
Sunday Mass 7:30, 9:30, 11:30 and 6pm
They have a museum, gift shop, rosary garden...
There are taxi vans that park right by the parking lot. We went in 2010 and were asked to carry up the offering.
Folks dress in theme park wear or dressier. I wore a sundress and husband wore slacks with a polo.
Very friendly and helpful ushers. The priest was very welcoming.
God bless!
BTW in case you are traveling to other locations, there is a website Mass Times for world wide and that comes in very helpful.