You game?
If memory serves me correctly, the following is true.
The chapel occupies the high ground and would be a good spot for a moab.
To park, you go south on route 1 and go past the main entrance and then make the first right. There will be two gated lots with the gates open after 4 pm and these lots should be free parking. Bear to the left lot and the back of the lot should be across the street from the chapel.
perhaps a dc chapter ping is in order
for our future, can you confirm the above ?