The campground is closed for the season. As with most campgrounds you are better off to do your booking online . Mill creek is a very popular campground and usually if you dont make reservations months in advance it's likely you wont get in. Very beautiful campground tho, and highly reccomend it.
It's off season. You can go for free until April or May, I forget. But no one is there and no camping, I believe. You would have the best luck looking online. On their website. But I take my dog every other day or so.
Thanks! Your answer is awaiting moderation.