I went hiking there last week and we ended up finishing the hike back down the mountain after dark and there were still 5 other vehicles there. Didn't seem to be an issue. Also, previously we have left our vehicle there while camping overnight and that wasn't an issue.
Not a problem at all. It's used for overflow parking for the group camp and there are some hike-in campsites as well. I believe there's a pretty decent hike-in site just up the hill behind the locked gate you see as you drive in. (I think, I can't say that with certainty.) But anyway, the point is lots of folks park there overnight since they're camping or doing late hikes.
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