Odd items to shove into an airline bag. The bag could have been found or grabbed in the airport as a convenient receptacle. I mean, who would travel with such strange baggage, so it might be interesting to know if the party was driving away from Faro Airport or toward it. If it was a multilane hwy., it might be possible to determine that from which side of the hwy. the lay-by was. Also the white bag itself sounds like it was better cared for than the contents.