Hello. Can't really camp at Trail Crest -- it is a small area at 13,600' where you top out after climbing the 97 switchbacks. The views are tremendous but not really a place to camp.
The usual camping areas are (1) Trail Camp, at about 12K, and (2) Outpost Camp at about 10K. There are other places, like Lone Pine Lake, Consultation Lake, and above Mirror Lake but below Trailside Meadow, that are used less frequently. Not sure which you have in mind from your post.
Have a great time and be safe!
