Having grown up in saskatchewan and hunting these deer for 30 years I have learned as you have that during the rut the big bucks cover a lot of ground.Over the years you do learn the hotspots but I am always surprised by just where a big buck will appear, so I do move a fair bit to try to locate them.The area I hunt in is very open and after a few days the big bucks stay out of the open during midday but are often seen at first and last light.Probably 90% of my bigger bucks are taken at these times so I do take a fairly long dinner break now so I am fresh and can stay focused during the peak activity.Our climate may be harsh and deer densities lower than many places but the size of the bucks that live here make all the effort worthwhile.