I wanted to do a multiple overnight bike trip starting here, but I cannot find a number or email to see it is allowed to leave your car here for such a duration. Can anyone give me some insight on this?

I've seen an RV park there for months in the winter with a permit. So I think he's right call the Park Police and ask.

Try calling park police. They can tell you. That park closes at sundown but doubt they are towing cars out.

I agree checking with park police is a good bet but I'm sure a note left on the dash would do the trick.