Can't give you any pointers, but I'm curious if you are looking to get a slot in the IBR or just do one of the other self-certified rides, like the Saddle Sore?
Last year I was all into the idea of the 1000-miles-in-a-day thing, and then started planning something that would allow me pretty high speeds and few stops (as in freeway riding). I thought of a run through the state capitals in GA, AL, MS and TN as being a sort of theme. As time when on, I started wondering what the point of going past a lot of interesting places and people I need to visit and not getting to enjoy seeing/doing, and the attraction just faded.
Who knows, I might make it one day, but the urge to stop for a few pix and check out the tourist traps would sink me.