Have been to this place a couple of times and love it! There is a campground you can reserve sites at which are large and we'll spaced. You can also stay for free on the BLM land surrounding the lake. (If you do this please leave no trace!)
Hiking around the Clear Lake takes longer than in looks because of all the fingers so allow a couple of leisurely hours.
Its a hauntingly beautiful, chill place. A must visit for fans of mountain lakes!