The best way to get out to Ft. McHenry and get a view of the harbor?

The best way might be to buy a ticket on Ed Kane's Water Taxi Service. During June, it runs from 10am-11pm Monday-Thursday, 10am-12m Friday and Saturday, and 10am-9pm Sunday. It picks up and drops off at 17 places around the harbor and you get a great view. Adults pay $8 a day for unlimited trips. They say to be sure to check in with the staff about where you want to go. Also, they provide a reminder that it's not the best mode of transport if you're trying to catch a plane.