SELECT DISTINCT c1.[Last Name], c1.[First Name], c1.Address, c1.City, c1.[Province/State], c1.[Postal Code ] AS Expr1
FROM (Campers AS c1 LEFT JOIN [Select c4.[Camper ID]
From Camp_Campers c4
Where (c4.[Camp ID]="DC102"
Or c4.[Camp ID]="DC202")]. AS c3 ON c1.[Camper ID]...