Do you have a predefined route that you will be taking? I know that many of us have favorite shops up here. Ghost has given you a great link as to shops and locations. Three shops listed on that list in NH are closed: Peggies Anns in Concord NH, Checkerberries in Northwood and Apple Tree in Hillsborough NH. There is another not listed in the NH list in Newport NH - Quilters Workshop.
In VT there is also Country Treasures in Chester, VT.
My absolute favorites are Quilted Threads in Henniker, NH and Keepsake Quilting in Center Harbor NH.
Here is a google map. I did VT shops - so the balloons are VT shops - but the red dots all over NH represents some sort of quilting businesses - many fabric shops. Just change the criteria to quilt shops NH and the balloons will change!
https://maps.google.com/maps?q=quilt...ed=0CAoQ_AUoAg
Let us know your route so we can be of more assistance!!