Sounds like a great trip. I don't know your exact route but here's what I do when planning our treks.
I would use mapquest.com and see where we would end up after 200-300 miles. Then I would use woodalls.com and http://www.allstays.com/Campgrounds/ to locate a campground.
Once I know where I am stopping I'd check the local chamber of commerce sites for those towns. Have found some hidden gems in those c of c sites including bluegrass festivals, ethnic festivals and some little known natural wonders. I'll also use tripadvisor.com for reviews and side trip ideas.
We aren't shoppers but we always stop at Lehmans Non Electric store in Dalton OH. They have great stuff that can be used for camping. https://www.lehmans.com/default.aspx
"The only time you should fear cast iron is if your wife is fixin' to hit you with it."-Kent Rollins
First law of science: don't spit into the wind.
Magnus