Here are some resources for camping/backpacking in Indiana
Adventure Archives Ep 4: Hoosier National Forest
http://www.youtube.com/watch?v=cyT8X_rN7tkThese guys are great. They seem to be IU students that are making these little videos about camping in Indiana. They are really long but provide alot of info
Adventure Archives Ep 2: Morgan Monroe State Forest
http://www.youtube.com/watch?v=S_yKz6L20ak&list=PLIuN82hcBpY2or52jh02mdNzdekXQRtQ_Another trip into the Indiana wilderness
Chain O' Lakes is one of the coolest parks. they have about a dozen lakes that you can camp around, fish and canoe. All the lakes are very natural and connected by little passage ways, perfect to explore in a Kayak. They don't allow motorized boats which is a huge plus.
My favorite parks are Turkey Run, Shades, Pokagan, Brown County, Indiana Dunes and Clifty Falls. Which you might already no about being a hoosier.
In Michigan: Sleeping Bear Dunes, Sleepy Hallow are cool state parks
As far as national parks in Michigan:"The Huron-Manistee National Forests are the only National Forests in Lower Michigan.
The Huron-Manistee National Forests comprise almost a million acres of public lands extending across the northern lower peninsula of Michigan. The Huron-Manistee National Forests provide recreation opportunities for visitors, habitat for fish and wildlife, and resources for local industry." HUGE
so is the Hiawatha National Forest in the UP
