A Second Amendment march without firearms in visible abundance would be kinda weak, ya think? And since there is no nationwide license to carry, people can’t legally leave their states with their guns to converge on Washington.
(Although it would make a LOUD statement if a half-million people broke the same law at the same time!)
The Imperium and its loyal scribes managed to ignore the 9/12 march, despite the assembled multitudes, so this one is doomed without visible firearms, IMHO. Perhaps this would work better as 50 state marches, despite the logistical nightmare?
Add to that the certainty that the area jails could only house a few hundred at any one time for any immediate arrests. However, I doubt that many folks would like to risk the consequences of being one of those few arrested and made examples of. I certainly wouldn't!
I plan on wearing an empty holster.