Mustang1,
there's quite a few organizations with touring B-17's. Your best bet is to find the org closest to you and start talking with them about their schedule. At this point in the year a lot of dates have already been booked up, but it doesn't hurt to call, e-mail, etc.
Don't quote me on any of the following. I don't handle booking, but I know a few things second-hand that may help you on your quest. I believe some org's will waive the appeareance fee they charge in exchange for giving FLEX rides. It all depends on the specifics of your show / event. You're probably going to have to pay for gas (three thousand or so gallons. If you're in New York, you're probably not going to want to book somebody from Chino, CA), lodging for aircrew (Up to ten people? Not sure how everyone else does it.) if they're going to be there overnight, and perhaps an appearance fee.
Contact information for the "Yankee Lady" can be found at:
http://yankeeairmuseum.org/contact.shtml
Just E-mail the person listed under "Aircraft appearances"
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Phil K.
Yankee Air MuseumSystems Admin / Ramp Crew / Professional Photo Ruiner