Since camping is first come first serve in the park I can't really complain about ending up here, especially since it's free.
That said BRING EARPLUGS. The trains are extremely loud, and since there's a crossing they'll be blaring their horns at all hours of the night.
Otherwise a fantastic spot with river access, clean locker toilets, well maintained sites, and grills, picnic tables, and fire pits at all the sites.
Do be aware there is NO firewood to scavenge on site so you'll need to pick some up before setting up camp.
RV camping is not allowed but it seems they don't patrol that very heavily.