Do you have any idea where they were buried?
I live a short distance from Eglinton, and pass it every day on my way to work.
The air station is now the City of Derry airport:-
http://www.cityofderryairport.com/
The Maydown site further up the road from it is now part of a small industrial estate, and Duponts plant, and Ballykelly is in use (for the meantime) as a barracks for the resident Army unit.
Aghanaloo, another station of that time, is also part of a small industrial estate, although parts of all of them are still visible.
Paul