My solution, if anyone ever needs it:
DLookUp("StateProvince","tblStateProvince","StateProvinceID =" & [fk_StateProvinceID])
Site address: " & [mainAddrLine1] & " " & [mainAddrLine2] & " " & [mainAddrCity] & ", " & DLookUp("StateProvince","tblStateProvince","StateProvinceID =" &...