The balloons are not dangerous, as nothing heavy falls down, like the rocket motor. That means that we can land almost anywhere. We often land in the east part of Sweden, in Finland or in Russia. We have flown a balloon as far south as Dalarna, a region in the middle of Sweden north-west of Stockholm. Well, up to a point.
Balloons fly with the wind.
If the wind blows the way you want to go, everything is fine. Since the winds blow differently at different heights, the balloons can be steered by changing altitudes. By releasing gas you make it sink, and by dropping ballast you make it rise. A satellite is a body that orbits another body. That means that the Moon is a satellite to the Earth, just as the Earth itself is a satellite to the Sun.