No matter how much I think I know about a unit I always learn something everytime I am out there. It might not be specifically about big game but I find a tank or a road or something everytime. So to answer your question is there is no such thing as too soon.
But more specific details depending on your unit the Elk might be down low right getting ready to migrate back up as the weather warms up so ust because you know where the elk is now does not mean he will be there come september. Same thing about water holes, lots of water in the woods right now that may or may not be there come September so dont fall in love with one now. The Rut changes things as well so being able to have a Plan A, B, C, and D is always a good thing.
Good Luck and take a lot of picuters to share with us
John