I said this to Kevin, but I'll say it here too. I am sick, and I'm not going anywhere this weekend. Honestly, riding next week is probably unrealistic as well. It's possible I would be better enough to drive reconnaissance next weekend, but I'll have to see. (And yes, I know that means I would drive to KC, then drive/ride to Lawrence, then drive/ride back to KC, then drive home to Lawrence.)
Bryan said something about organizing something like this for April, but that's not going to help you out for the rally. If we wanted to do it all together, we could wait and see if he'll do it then, and then you guys who want to run your bikes could go out now. Or you could do both, whatever, but I'm not gonna be there this weekend and probably not next.
I don't know exactly how many miles you all want to practice on, but if you're not up for a full Lawrence-KC ride, the stretch of old K-10 between Eudora and Lawrence is a good 6 or 7 miles of flat, straight, relatively decent pavement with a 55+ speed limit. You'd have to get yourselves out to Eudora, though.