Most DNR ranges are BYOS and you can only shoot at paper/cardboard targets, and the height of the target must be relative to your firing position so you hit the berm.
A lot of guys use realtor signs, PVC pipe concoctions or those pre-made metal bases that use firring strips. I use PVC but have my eye out for one of those metal bases.
Take care to observe the rules strictly at DNR ranges. The fines for offenses are not cheap. More than one member here got a costly fine for going over closing time. The rangers will hide in the woods behind the firing line and come running out to issue citations. Not the wisest way to advance on an armed person with a 30 rounder and hearing protection, but maybe they receive no training and don't know any better.
If you enjoy shooting outdoors regularly you may want to consider a private range.