I mostly bring the maps I find on web sites from the park. They are usually good enough for me to find the trails and roads in a park or forest although many times they are not that great.

None of the topo maps I have tried are all that good at showing trails.

An important thing to me is to protect your map from water. Even sweat can make a paper map unusable pretty quick. I print mine out on regular 11X17 paper but keep it in a gallon sized zip lock bag. I fold it over and trim it a bit to get it to fit. You can pay a bunch of money to get waterproof paper to print on, but a zip lock bag is cheaper.