Each year seems completely different to me. Some years by bow season the elk are all herded up already. Some years they are fired up and ready for a fight coming into a bugle good. Some years they will answer but stay put and you have to go all the way to them. They are not fired up but interested in who is around. I just get out opening day and see what the elk are up to and adjust my style of hunting accordingly. It also varies by area, I've seen them herded up in one area but still alone in other areas. I am no expert, but this year I have not seen bulls with cows yet. I think with the heat and earlier season we will have to get in their backyard and get close to get a reaction.
My buddy last year had big bulls coming in all summer & fall to his cameras / honey hole and was bragging about the "gimme " in filling his bull tag. One week before the season they were gone. I think all the hunters putting out stands & last minute scouting sends them deeper. Have a great season.