Hello Dottie,
I am sure you visit Joannes in Grapevive for all sorts of supplies. As for Quilt stores...Quilt country in Lewisville
http://www.quiltcountry.com/ and the Old Craft store in the main old town part of Carrollton
http://theoldcraftstore.com/wordpress/ are also good shops to visit.
Also if you get a chance visit McKinney a lovely place to spend a day and yes another quilt store The Quilt Asylum.
http://www.thequiltasylum.com/
I have stitched and crocheted on BA airlines before and it has not been a problem.I travel back home to N Ireland from Plano Texas every year or two. I wish you a safe trip and a great time in Texas. Ann