There are no hard and fast rules. Many times they can be in the brush that regrows after a fire as there is often feed there. If there is shade there, they may bed there as well. Slopes that burn that hot and every tree is gone are often south facing, meaning not a lot of mid day shade, in which case they’ll go into a nearby draw or change slope aspect to get shade. As far as how far they are moving….as little as possible. Can be 10 feet or a mile. Just really depends on the area, the deer, pressure, etc. One thing is that the bucks will try to stay up high and will use little springs and seeps for water if available, whereas the does will come down to established water like ponds and creeks. If you are seeing does down low but no bucks, then look into higher, thicker cover. Be prepared to sit and glass a long time and pick a hillside apart. They definitely like burns. I shot my buck in a 3 year old burn last season here in Ca.