I was there last weekend and there are a few with in 1/2 mile of Camden
Virtual Cache right next to Canden
http://www.geocaching.com/seek/cache_detai...ee-47c14cbd9996
Right at inner harbor - please e-mail me if you find this one. 1000's of people during the day. looked for it at midnight for 40 minutes - no find but it IS there
http://www.geocaching.com/seek/cache_detai...84-4fce1acbc3df
Very close to the last one
http://www.geocaching.com/seek/cache_detai...e9-815ac70ee036