Bulls are going to be where the cows are around rut time.  If you locate a few wallows they are definitely worth checking out.  If a bull has been there you can get on his tracks.  If you focus all your efforts on the wallow(s) you are limiting your chances.  My  

 is: 1) Make sure there is elk in the area you want to hunt. 2) get to know the area you are going to hunt so scout , scout, & scout. 3) Shooting, Practice, Practice, & Practice. 4) Cover ground to locate elk.