HI, I live in the Sevierville area and there are several quilt shops in the locations you are looking.. and they get their fair share of my money.
Maryville has 2,
Sevierville area has 3, all great places to shop
Gatlinburg has one small shop but I haven't been there.
Knoxville has 2 that I visit plus a large JoAnn's. I am sure there are probably more in Knoxville, but I only shop at these two.
Cosby just outside Gatlinburg in the mountains has 1.
I know Chattanooga has one, have purchased from them at quilt shows and sure there must be more.
If you would like more details as to locations, names and directions just PM me with your email. It would take too much space to list them here.
Also coming to Knoxville July 22-15, is the AQS Quilt Show that is usually held in Nashville, there are sure to be lots of vendors there.
Hope this helps some.
Jacke