Translation of exploitation in Spanish

In the early morning, before going to the airport we went to the travel office of the Vietnamese airline company to avoid about possible problems with the entry. They assured us that everything was fine.
They were floating in self made tubs and rowed with sticks. When they reached our boat they tried to sell us beverage. We vigorously denied them access to our boat. It just did not help.
The view from the top was amazing. One could see the hugh lakes and the surrounding mountains, which were still covered in snow. The landscape was really fantastic and blue skies added to its beauty.