I'm not in Westerly but very close and you're definitely right about that Walmart. I have no idea where those people even come from. I can't even tell whether it's worse in the summer or the winter. This is a very expensive area to vacation in the summer, and they're NOT the college kids since they go to the North Kingstown Walmart.
Edit: Actually it has to be the locals from Ashaway, Bradford and Hope Valley that shop there. Hope Valley is basically if West Virginia started a colony in New England, and Bradford is a town where everyone in the whole town worked at one of two textile mills and both of them shut down 2 decades ago.