You bet you can hunt mornings, lots of guys get in the rut bear is a evening thing but if you bait right and and can keep the surrounding area under control(no noise, dogs, poeple , ATVs etc etc) bear will come and check in all day until they get spooked. Then it becomes a a night time thing.
If you have bear coming in late am just get yourself settled in at sun up with a cup of coffee and wait em out.