Not a lot of "those" types around here. There's a Vulcan Rider's Association rally in Arkansas later this year sometime, and a gathering of some forum Vulcan owners down south somewhere. Hit me up if you go, though! We'll probably be there! 
There will be plenty of parking. I've done Run for the Wall twice and there's a huge field just north of the Lincoln Memorial (@23rd street and Constitution Ave) where all the Pre-Rolling Thunder parking happens. I never did the actual Rolling Thunder part of the ride, but understand there to be plenty of parking for that as well. From that parking area is easy access to all the memorials in that area as well.Baynesjp,
When you go is there anywhere to park your bike down by the National Mall area. Trying to figure out if I am going or not. We will end up camping some where outside of Arlington but if I can't park my bike anywhere near there I probably wont go.