So you are saying:
seven teams south of Williamson County
six teams in Williamson and Davidson
five teams (Dickson, Springfield, Beech, Hendersonville and Portland)
Odd number of teams in two regions, I don't like that.
six teams south of Williamson County (move Springhill north)
six teams in Williamson and Davidson (move Hunter's Lane to the north region and pickup Springhill from the south)
six teams (Dickson, Springfield, Beech, Hendersonville, Portland and Hunter's Lane)