Really really really really really want to go there!
Aw! It is stunning, in some of the ways the grand canyon is in which you just keep staring at it saying "wow". There aren't many trails, but there is a rim trail, several side trails to peaks, and at least one trail to a waterfall.
If you do go, spend a night to the north in Whitehorse falls campground (but bring extra drinking water). There are also hot springs nearby, and a river trail that looked super fun.
Also, do the boat tour where you can explore the island. We couldn't do it because they had closed the dock for repairs. But it sounds fun.