If you have a smart phone you can download an app called "Avenza", this will allow you to download a georeferenced map to your phone and you can navigate to where you are looking to hunt. Very user friendly. Game and fish websites usually has individual maps for each county that you can down load or print off, I try to print the maps in 11"x17" if possible so I have a paper copy to make notes then I have one downloaded on my phone to navigate to. If they don't have the maps online, then send an email requesting individual county maps that are geo-reference and you should get some.
I'm sure others will way in and correct if i'm wrong, but any public land owned by the state or feds will require steel shot. The CREP and school lands do not. I have had success on all lands but school lands. The hunting atlas does a good job of explaining what can be done on what lands. I do prefer lead over steel, I carry two vest, one for lead and one for steel makes it easier then having to transfer shells when hopscotching from place to place. I shoot 20's, 16 and 12 gauges when out there for lead shot and only use my 12ga for steel and I drop down to #4's for steel as well, however, I'm looking to shoot 6's in steel next time out as I hunt with pointing dogs mostly and my shots are typically close. I also shoot my 870 so I can load up 6's then back those up with 4's.
Last piece of advice is make a daily game plan on where you are going to hunt and try to stick with it, otherwise to will constantly searching for a place to hunt. I hunt usually in early November and most of the fields I have hunting I could have limited within the first couple hours of hunting, if I could shoot straight.