I live in Indiana, and was wondering if anyone on here knows of a place that sells native saplings in large quantities. Thanks, any info is appriciated.

This should be a good place to start:
http://www.in.gov/dnr/forestry/6270.htm

Calling your local county forester is also a good idea.

Thanks!! this is exactly what I was looking for.

May want to check with local Soil & Water Conservation Districts, they may have annual sales (I know we did in NY).