Inspired to some extent by suggestion of others in this thread:
Guardians of Antiquities
Guardians of Ancient Sites (GAS)
Guardians of our Heritage
Heritage Watch
Antiquity Watch
Ancient Site Sentinels (ASS - we could kick some)
Sentinels of Antiquities
Sentinels of Ancient Sites (SAS)
Defenders of.. etc.
Protectors of.. etc.
Friends of.. etc.
Where the hell is Baza when we need him? His "Stonehengineers" was a brainwave.