Look online for shops along your driving route. Here in Gastonia, NC we have Mary Jo's just off I-85 exit 21. It's not a LQS but a huge fabric/notions/dream sewing room and they always have a great selection and prices....I realize this sounds like an ad for Mary Jo's, but I have been in her store for most of my 40 years and it really is a great place...you can even ask about drop shipping to your home/rv.
Just trying to make your long drive more fun. Have a Merry Christmas and wonderful winter in FL.