Frank,
IMO, going thru Kent Narrows makes the most sense from B-more if, like Kurt says, you don't draw too much...the channel on the north side can experience some shoaling. It's also a more interesting trip than going around Bloody Pt...you'll use less fuel, too. Waiting for the drawbridge may slow you a bit but there's usually action on either side of the bridge to keep you occupied. Keep from getting too close to the DB while waiting as the current can get tricky.
I still like St Mike's Marina where they can fuel you right at your slip. That is, as long as you're close enough to the pumps