Wow, that sounds like fun. It might help if you could provide your itinerary. You going to fly there and then travel by Euro rail or a combination of rail, busses, cruise ship?
For example, (if I was going, I would), when you visit a certain place, read up about it on travel sites and try to visit, eat, etc where the locals go. That would be cheaper and give you a truer look at the people, their culture, etc if you go "off the path" most tourists take. Or will your tours be guided?
There are a lot of possibilities, so it would help if you can show us your itinerary. Have fun!