RE: finding good hunt spots by map
Saddles are low points or dips along a ridge, deer like using them because it allows them to cross over the ridge but still keep from being "skylined" on top of the ridge as they cross. As far as your ridge question goes, yes that's what we're talking about. Ridgelines can create great pinch points. Cliffs can be even better, because they limit movement even more - can't go up and down like on a normal hill, they can only follow the horizontal paths on top of the cliff or on the bottom. To elaborate more, if you can find the first spot along that cliff where it is possible for deer to move from top to bottom, you've found another spot that could be promising for a tree stand. Anything that limits movement is key.