Elizabeth River
I've marked the three starting and ending points in the videos below, but I would strongly recommend against all of them. The lower part of the Elizabeth River is bulkheaded for much of its length, more of a storm drain than a river, and the Arthur Kill looks filthy and a little dangerous. The videos are interesting, but I don't ever want to go there myself. The upper reaches of the Elizabeth River might be nice, although I don't see any obvious access points, and there are a number of weirs that could be a problem.