Tres Bien! Petitpoucet!
A programmer over at reddit.com made this app for hikers and fishermen! Sounds exactly like what you want. (I use it just for kicks and giggles.)
http://www.dystroy.org/petitpoucet/
Basically you place stones down on your map. You can name them and even attach a photo. It's designed with hikers in mind so it's simple and fast. A really good app.