Parking is small but okay. If you follow green walking route C, you will come to a small lake with a nice restaurant. There is also a large parking lot here, perhaps better than the one at the visitor center

A super friendly park ranger who allowed us on the site without any problems, are here for 1 night without facilities, in a very quiet area 👍

Yes, you can spend the night here, but you can do so at any parking lot. Yes it is quiet, but we drove on.