We chose to car camp at this location after another sno park was full for the night. Since we were just sleeping in our car, we parked close to the bathrooms. That night was set to bring a ton of snow due to the storm and we noticed a lot of RVs parked in the lot waiting for the next morning. No one bothered us and it was relatively peaceful. You do need a parking permit for this (and any Oregon sno parks) during the winter months. You can typically purchase them at gear shops or Walgreens (I haven't tried this, I've typically bought them online and had them mailed to me). That being said, this is a great option you don't want to pay for a night in Mt. Bachelor's parking lot and you can use the permit for the entire winter season.

Heads up: lots of snowmobiles frequent this location, so if you're not okay with being woken up by them you can park further away or choose another sno park that is in the area.