I'm a novice knitter so I thought I'd take a look & see what google had to offer. Savannah -
Unwind Yarn and Gifts is on Facebook. If you aren't on Facebook, I think if you look them up on google you can see their Facebook page. Here's their phone # (912) 303-3970. Address, 7710 Waters Ave.
Wild Fibre has an after hours knitting. They are also on FB. Web: http://wildfibresavannah.com/
I didn't have much success finding shops for the Charleston area. Hopefully someone who lives in the area will know of a place or two for you.
BTW,this is pretty special - your little shop stop! Be prepared for her to find more yarn that must come along on the trip.
2014 Georgetown 378TS & 2014 Jeep Patriot // Traveling with DH along with Katrina, Pas & Missi (our 3 cats)