http://intransit.blogs.nytimes.com/...ns-about-visiting-national-forests/?_r=0
It seems that the National Forest are closed for some activities but hunting is not one of them. Go hunting it is not against the law.

"Judi Perez, a spokeswoman for the Hoosier National Forest in Indiana, told The Associated Press that while campgrounds were closed, people could still access the forest because it has no fence"