Yes, the history of the Bieguns or Bieguny is interesting and demonstrates the struggles and attitudes that these groups (frequently unrelated genealogically)held centuries ago.
As to wandering, and your father and grandfather, you have to remember Russia saw a great deal of turmoil, invasion, wars, disruption of family life: that could account somewhat for the "wandering spirit:" People had to flee real danger. To this day we do not know what happened to our relatives during the Citizens War, then WWI and WWII in the eastern edge of Ukraine, the Sea of Azov area, between Rostov and Ust-Labintsk.
For more information about the Bieguny, you might want to look up this book; I mentioned it in the message to Constance
Biegun and quoted from it: RUSSIA OF THE RUSSIANS by Harold
Whitmore Williams, published in 1914,
London, Sir Isaac
Pitman Sons