I was looking at a place to hike this weekend (although it's supposed to storm pretty bad, yikes!) and I was trying to find a place to get topographic maps of the area. I've seen this site Trails.com that offers maps but you pay a membership fee. Is this worthwhile? What are other alternatives people use? There are some places that you can get free topographic maps for like the ozark trail here in Missouri

http://ozarktrail.com/maps.php

but I'm wondering about the other places.