Ther's a bus that goes straight up connecticut from Dupont Circle and then up 18th Street I forgot the number. The only other bus continues on Connecticut. I do know a few secret places to park there, but night time is not a good time to be walking in those areas.

DC has changed a lot since I lived there.

Thers also a bus that goes down from woodly, Conn Ave, onto Adams Mill RD and then 18th Street.

If anyone is interested, I'll check on the bus numbers. Otherwise I believe thats a 6-8 block uphill walk from Dupont circle.