Plenty of free parking!

Yes the ccc free bus also stops right at the gate. It’s a bit of a hike out to the gate, so recommend an Uber if not up to waiting or hiking in the sun.

Yes

You could either take a cab or the free bus called the Circulator. You would take the Banner Route on the Circulator to go from downtown to Ft. McHenry. It's 3 miles from the Inner Harbor to the Fort, so definitely walkable if you're up for it. It's not bad as long as the weather's nice. You'd see a few mediocre blocks with a lot of traffic, but you'd also see a lot of charming neighborhoods with different types of rowhouses. It's a good way to get a feel for the southern part of the city. (Oh, but which train are you taking? The Penn Line which drops you off 2 miles north of the harbor, or the Camden Line, which drops you downtown?)

I would suggest Uber or Lyft

Yes the fort is open today. Normal working hours

sorry, don't know.

To visit the Fort is $10 per person. However we only visited the Visitor center to see the exhibit and watch the video and the grounds and that is free.

3 hours is plenty of time. we were there for about an hour.

No, they don't have any scooters, or motorized vehicles. I to have problems getting around. I have taken my power chair there. It gets into most of the places, but it can't get into some parts of the fort.