Hey Ozzy!
Exciting trip you have planned - Good for you!
Give me some idea of when you might be swinging through the Michigan, Ohio, Indiana, Illinois area.
There may be some events you might be interested in if I had a window to focus on.
I don't know if it would be worth a "special trip" to just check out a few trucks, but if you are in the area of anywhere around Jackson/Ann Arbor, Michigan, I would be more than happy to give you the quarter tour of our small Oshkosh (military) collection.
Seems like there is a lot of events being scheduled for this summer, so there may be something you might be interested in. If you are going to be around between 6/19 to 6/25, the Steam Railroading Institute in Owosso, MI is having an amazing show. They only do this every 4 years or so and this year they seem to be "pulling out all stops". They are going to be hosting a number (I have heard around 6) Steam Locomotives with rolling stock along with their own restored Berkshire #1225 (the one used to model for the movie "Polar Express") - and then they are also going to have a cool car/truck show (to which many of the guys are planning on bringing their military trucks, etc.) - and then they are also going to have some military aircraft fly into the nearby airport for display at the same time. I think they are also planning on having some "sprint car racing" at a local track going on. Going to be a huge event.
Anyways, give me some ideas.
Dave