Every bull is different, some like a rambler, some like a split-level, some like a bungelow, some like city life, some like country life. Point is you have to get in there and find them. Big bulls are likely by themselves that time of year in places they don't have to travel far to eat drink and sleep. A single elk doesn't need a large area of feed like a open pasture or a clearcut, a open creek bed or patches of foliage in the timber can provide enough feed. I like to look around small openings with feed and thick patches of timber and brush that are hard to see through but not so brushy they can't easily slip out of. Boots on the ground looking for sign is the only way to know where to look.