Carl's place was just as described, homey, unpretentious, basic. The art and artifacts throughout his home reflect his world travels and journeys resulting from the books he has written. As he mentions, the Big Bear Cafe is two blocks away and it's a decent neighborhood/hipsterish place for simple food. Open from early morning to early evening. Barbecue place a couple of blocks further serves great sandwiches.
The Metro Red Line station is about a 15-minute walk south on Florida, at 3rd. Gets you to walking distance of the Capitol and National Mall. Or you could transfer to Silver line if you want. We stayed five nights, and we got to know the neighborhood by taking walks after eating at the Big Bear. There's a small charming pizza place in that area. Take out downstairs, restaurant upstairs.