Translation of furtiveness in German

Then we did a boat trip which started somewhere in the delta and ended somewhere else in the delta. Each couple received a boat and an elderly lady had to row. I did not feel comfortable with that.
We were not the only tourists, there were a many boats sailing on the same route. At one point the driver stopped the boat and immediately children of the village people approached us.
We caught the last bus leaving from Calama to San Pedro the Atacama in the Atacama desert, the driest place on earth. Even NASA is using this place as a live moon simulation area. It was night though.