Hi Harpgirl,
The Archive of Folk Culture is a tremendous resource, and there are lots of knowledgeable people there who can help you find stuff. Jennifer Cutting is still on the Folklife Center staff. Joe Hickerson, while retired, still comes in almost every day when he's in DC (he's dividing his time between DC and Chicago these days). His incredible knowledge of the collections in the archive is not to be missed, if you're lucky enough to be there on one of the days he's in town.

If you're looking for particular kinds of material, it might be a good idea to give the Archive a call before you come, to tell them what you're looking for and to let them know you'll be in on a particular day. This is especially important if you want to do any listening. The reference desk phone number is (202) 707-5510.

If you're still looking for a B&B near DC, send me a PM and I'll give you a great lead of a not-too-expensive place in nearby Takoma Park. (Its owner also owns a terrific handcraft store next to the House of Musical Traditions in Takoma Park, which is the heart of DC folk territory.) Takoma Park has a Metro stop that will take you to Capitol Hill, so you can leave your car and instruments behind (a VERY good idea, since parking is at a premium near the Library, and limited to 2 hours).

Looking forward to hearing from you. Kathy