We were there back in 2010. I recall that the campsites within the park are generally not serviced so we stayed at a nearby full service campground outside the park and toured with our tow vehicle, sorry, don't remember the campsite name. We were there around Martin L King's celebration day, they offered free entry so it was busy as well.
You can't take your dog on the trails there, a bit disappointing as we didn't want to leave him in the truck while we did some trails.
2013 Redwood 36RL, 2011 F-450, Sat Internet, Sat TV