In my experience deer bed where they feel safe. If that is on the top of the hill of in the bottom of the valley. Typically I find deer are bedded close to food/water and in the thickest nastiest cover around. Best way to find the bedding areas is to walk your property. Find the rubs and scrapes and follow the rubline or trail they are on sooner or later you will run into a food source or a bedding area.