I second this. The museum is huge and they have a lot of really cool stuff in there. Last time I was there they had an SR-71 Blackbird, a B2 Stealth bomber and the Bockscar (the plane that essentially ended World War II). I believe all of those are permanent exhibits in Dayton but you may want to double check that.
It's a free museum but if you're a history buff you can easily spend a full day there. That place is top notch.
Yeah, that's why I suggested it in my response. They still have the sr-71, B-2 and Bockscar. They also have an F-117, a-10, a lot of the F- jet series, a MiG, and the new Space Shuttle stuff should be open by then. If you're planning to spend a few hours there, get their early and register for the Presidential and Exhibition gallery tour. You can walk through the actual plane that took JFK to Dallas, brought his body back home and LBJ was sworn in on. There is also a lot of bombs, rockets, engines and tons of other cool stuff to see there.
Thanks for all the input, it looks like the 75 is the way to go, and it gives me options of the Airforce Museum and or Neil Armstrong on the way... (it just depends what time I leave and how tired I am). I have also decided that if I am still keen for the Ohio State Reformatory in Mansfield (the shawshank prison) , which closed in 1990, its only an hour from Cedar point, so I can take a break there if I need. (on a different day!!)...
As the time gets closer, I am sure I will have more questions, thanks for all your help