Creeks wander around over time whipping back and forth over the landscape over thousands of years. Lots of camps are on creeks and often the creek would cut over into a camp and dump the artifacts. My guess is that where you found those there are many more and possibly its a place used for thousands of years. Check the banks near and upstream from where you found those and my guess is that there are more.
Have fun! Nice artifacts. The really nice scraper kinda looks like some middle Tn material or up and around Duck River.
What you want are pieces you can place in a time frame (archaic, woodland ,paleo, etc)