Seemed to be plenty of spots when I got there on a Sunday. Far enough from the main highway, I didn’t hear any traffic in the middle of the night. A caveat however, the east side of hill itself seems to be an active rock quarry. That means if you are waking up on a work day, it may be somewhat of a rude awakening

First come first served, even early in the season it was busy. Breathtaking scenery Vault toilet

If you are going south from Bend, you have to turn around at exit 151 due to center barrier now constructed

There are a few campsites and some are obviously used frequently. You will encounter some road noise from hwy 97 but otherwise peaceful; at least early in the season