it's probably too much of a hike for you, but if you don't mind going to sothern mass there are a few places doing cash and carry that don't require a membership. Cirelli foods is nice and easy as their flours (all trumps, etc.) commercial cheeses, and stanislaus tomatoes are right out in the open in a retail store attached to the warehouse.
If you can get a tax id number for a small business you can get a RD membership for free, and there is one in providence ri. good luck