Are there shops in the area?

I would gest it would be all about what you are looking for If you are looking for something like at Market commons the answer would be no

There is one right across the street

Yes, across from the Marsh. Lazy Gator. Down past the Marsh, South more shops . Local vendor's behind Bubbas Love Shack

DeadDog Saloon has a few bar type items, mugs, shot glasses & coozies. They also have some clothing items, I saw t-shirts, tank tops and sweatshirts. They all have the DeadDog logo. I have also seen plenty of places to get bait. I'm sure you could find a rod and reel or crabbing traps too. Otherwise you are out of luck on the marsh walk but they do have other shops close by.