I see a lot of ladies with small fold up totes with wheels, sort of like a grocery/laundry cart. With a bad back you may not want to carry all the goodies you are sure to find at the show. Here's a link to what I'm trying to describe. Or if you have a small weekend suit case with wheels that would work also. It's much easier to pull a small case behind you than carry a dozen small bags even if they each only contain a yard of fabric, plus you can stash your purse in there also.
https://www.bedbathandbeyond.com/sto...=c&matchtype=e