+1 on van Zwoll.
I also found the Elk Hunting University series of articles on the Colorado Dept of Wildlife website to be very useful, and in fact was rarely able to find elk until I started using some of the things I learned there there.
For example, elk will only feed on grass while it is still green. If you're on the dry side of the mountain walking through dry, dessicated grass you are unlikely to find many elk feeding in the area. Between the dark timber and areas where grass is still green .. much better odds.
Also good discussion of benches, funnels, etc. -- at least from what I recall.
And its all free.
A lil knowledge is a beautiful thing.
