When were hunter gatherers around in america? why and when(a date or range would be great) did they settle down?

Answer 1

No specific date can be given because it depended upon the tribe and the area in which they lived.

http://en.wikipedia.org/wiki/Hunter-gatherer#History

http://www.archaeology.org/9909/abstracts/hunter.html

http://thepaleodiet.blogspot.com/2010/05/ishi-americas-last-known-hunter.html