Thanks, Lefty. This is the first time I've found a property with a MARSHA code that you can't book that way!

In any event, I called them today; the woman on the phone sounded very pleasant. They have a variety of room types available from standard "one room rooms" (as she jokingly called them) to an entire 3 BR, 2 BA house. The place is very often booked by large groups, and individual travelers ("transients", in their lingo!) can only make reservations 30 days in advance.

The kicker for me, though, was that they do not participate in Marriott Rewards. No points earning or redemption, and no elite benefits. As wonderful as the place sounds, I'll take my business elsewhere (The Inn at Little Washington has similar rates, for example) if I'm not going to earn points or nights.