So like actually into DCA? Only issue I would see is then only people with a hopper could use it and they'd have to check your tickets to ride it. Think like the Hogwarts train at Universal in Orlando. Which would be kind of a bummer if there was a ride in the parks a single park ticket couldn't ride.
To go to DLH or PPH could work, but could only be a drop off unless they set up bag check areas over there. Esplanade could work, though, since it's in the secure zone.
I love the idea of Heimlich, lol!
(and yes, totally over thinking this, lol!)