If you haven't yet begun your return trip, I can give you some suggestions for different LQS's in the Carolinas. You can either post your expected route here or PM me.
Those of us who live in the Carolinas are quite spoiled when it comes to quilt shops. Depending on your starting point, you can hit anywhere from 4-10 shops in one day!! If you were to count the two states as one, we have more quilt shops than any other state, including Texas!! We have so many shops, there are 3 different shop-hops... the original "Carolina Shop Hop", which hits about 20 shops from the Appalachian Mountains to about an hour west of Charlotte. The central part of the two states hosts the "Mi-Carolina Run" shop hop. And I apologize that my brain just died, I forget the name of the hop for the eastern part of the two states, but there IS a hop for the shops in the coastal Carolinas. All three shop hops have LQS's in both North Carolina and South Carolina.
One thing for sure - if you're going to travel on I-85, you MUST stop at Mary Jo's in Gastonia (about 20 minutes from Charlotte). It's quilter's heaven!!!