There is really no route-finding problem at all. The chute is the only sensible-looking one when you get there. It's very broad at the bottom (~11,000') and gets somewhat narrow at the top. Leave the trail and hike past Grass Lake to enter it.
The chute is very loose the whole way up. I always head for the right hand side and move onto the solid rock there as soon as I can. (Unfortunately, it's not very soon.) At the top of the chute, the summit is a mile to the NE.
But it can be tricky finding the right spot to descend on the way back. I'd recommend spending a few minutes at the top of the chute, memorizing some landmarks, before heading off to the summit.