Amtrak runs to Quantico, then you might be able to take an Uber or a cab.
No
The park is maybe a mile from the Marine Corps museum. Maybe they have a tour to that
Not likely. You might find a bus to Quantico, then Uber over.
No. Definitely not.
I don't think so. It is bit away from DC for a tour bus.
Thanks! Your answer is awaiting moderation.