I'd suggest a few practice runs at various State Capitols en route first. See if any "steam" can be gathered along the way while practicing good group control, leadership, security, permits, media interaction, keynote speakers, a raison d'etre with a desired reult... that sorta thing.
But DC in July? Not for me. Way too humid.
A free people ought not only to be armed and disciplined, but they should have sufficient arms and ammunition to maintain a status of independence from any who might attempt to abuse them, which would include their own government." - George Washington, January 8, 1790, First State of the Union Address