I am so glad that Mimi posted the warning about Marden's in Maine. That said if someone has mentioned a SPECIFIC Marden's on here, they'll have loads of fabric and at a good price. I shopped there on my way to Nova Scotia in June coming and going. We were on trikes but I mailed three packages home and crammed the considerable spare room we had. Their selection and prices are GREAT! We're going back next year just to shop Marden's!!
Too bad you aren't going through North Carolina one way or the other. Mary Jo's Cloth Store in Gastonia (30 min west of Charlotte on I-85) is a huge favorite of quilters. Tour busses make regular stops there. MJ's can't be beat for selection and price, IMHO, and worth a 3 or 4 hour detour to shop there.
I agree that Lancaster has lots of great quilt cotton shopping. DH took me there this spring but I favor MJ's and Marden's over these shops especially if price is a factor.
Have fun and let us know what you discovered and where!!