Ken and I are definitely in - we'll be driving up early Friday morning.
One car between the two of us (yes, I bring a lot of crap, and I won't block the windows while driving).
And our tent takes up about 8'x14' of space when assembled. (Not sure how large the sites are.) So, if we have to get our own due to space, we're not opposed to paying the full $20 per night.