RE: ridges, steeper terrain
I find, least in this country, that deer dont want to climb ridges anymore than we do, they will tend to stay low or high, and when moving at their own pace will take a gradual path uphill, only when they're running scared will they run straight up or straight down.
So knowing this may help you strategize about staying high, or perhaps how a deer would travel.....they may curve around to stay high,