http://elk101.com/
Elknut.com is another good site.
Late August is when things start going.
I think in early to mid august the Velvet comes off.
Rut will be on from last week in August until the end of Sept. I think there is even a 2nd rutting/breeding period later in Fall, if any cows didn't get bred the first time around.
Elk don't like quads, and alot of hunting pressure.
So my best advice is get away from other hunters in back country areas that are hard to get to. Use cow calls more than bugles. 2 people is a good min. one caller one shooter.
As far as a herd bull, unless you get really
lucky don't expect to bag one of those until you had a few years experience under your belt.
U should also learn the difference between a location(non challenging) bugle, a challenge bugle(with grunts), and a bugle with chuckles(tending bugle).
Cows also have alot of different calls. Mew, Chirp, Estrus, Hyper Estrus.
To all calls, whether from cow or bull, there is an appropriate response for every situation, and if you come back with something that does not make sense the Elk will likely leave.
example. If you hear a location bugle without grunts don't respond with a BIG aggressive bugle with grunts at the end of your call. The location bugle is used by a bull to call cows. If you respond like a big bull than more than likely he will be scared off.
I would suggest purchasing a BuglingBull.com or Primos palate plate single diaphragm reed call and start practicing. Don't buy a double or triple reed one.
The best advice is to hunt where there is alot of Elk and no other hunters.

