Look at that ringfort density! That line is 2 miles long. These people were pretty close neighbors (dispersed homesteads); you could go next door for a cuppa…something, not sugar or coffee. Some of the greater distances are across creeks/marshier areas. Crannogs are artificial islands—very defensible housing locales. See how small many fields are today?…a legacy of thousands of years of chopping up control of the landscape.