Great question. 10+ cells is really too far from the center, if counting directly from the center. The idea was counting steps from the location you take the quest, so moving 1 hex was 1 cell, 2 hexes would be 2, and so on. Once you reached 10, you could place the new location, or deliver the quest. Sorry that it wasn't very clear!
I will provide an additional maps in the downloads for more options and a larger overall play area.