Indiana has about 3% public land, and a large amount of it is in the south end of the state. The HNF alone is split into three different parcels, none of them small. Don't overlook the various state forests either, there are tons of them down here, some are as small as a hundred acres. You can locate them on a topo map pretty easily, the smaller ones often get little or no pressure simply because most folks don't even know that they exist, especially those bordered by private property. Try searching for state forests near where you plan to stay, odds are you'll find several with just a small amount of time spent with a topo map site. If you hunt small state parcels be sure to bring a GPS, and a map of the parcel with it's GPS boundary coordinates clearly labeled. Bordering landowners are often not aware that public land is just across their property line, or sometimes even where their property ends.