Sven, why not do both? You can live there on the farm, help out when you can, and once every couple months go travel around for a few weeks.
Spend time with family every chance you get. Many of us wish we could go back and spend time with our loved ones before they passed away. I really don't know my dad, but my grandfather has always been something special to me, yet I still lived a long ways off. He passed away a few years ago and it really hurts that I didn't get to know him better and spend time with him. Avoid that if you can.
Who's more important? Your dad or your friends? You can manage both, if you want.