Please don't treat this like car camping
I understand why people are lugging wheeled carts a mile into this campground, but it is technically not allowed. This is a backcountry/backpacking experience. Most of the hike-in is on Hadow Trail, which is dirt, not gravel. It is technically an equestrian trail too, but there's no way a horse could make it without breaking an ankle right now; the trail is so worn down by wheeled cart usage that the park has created a service project on the American Hiking Society's website calling for volunteers to do restoration work on Hadow Trail on this year's upcoming National Trails Day.
I hiked in while it was raining, and the mud wasn't as bad as I'd feared. However, the worn down parts of the trail attracted rainwater drainage, and the runoff narrowed the trail significantly. When I got to Boston Mill Rd Trail, which is gravel, the hike was easy, until the spur turning into the campground, when the trek goes uphill. If your site is further back, you will be hiking up and down many hills throughout the campground. The hills are fantastic for helping each site feel like a little private oasis. Even if the campground is full, I think most of the sites would still feel shaded and private because of how they're dispersed throughout the hills.
My site bordered the buddy site and scout group sites at the beginning of the campground, so there was noise from loud kids but not as bad as I thought it might be. I was still able to enjoy peace and quiet, as the group respected quiet hours and was busy hiking the rest of the state park during the daytime, so don't shy away from this site if it's the only one available. The group sites also have their own latrine at the beginning of the campground, which pleasantly surprised me because this meant there were two latrines fairly close to each other, just to accommodate projected usage. There are many thoughtful details like this throughout the design of the campground facilities.
For a backcountry campground, I was SO impressed with how stocked and clean everything was. Firewood is $8 (honor system), but there was some leftover at my site already. My firepit had a quality grill gate too. There are LOTS of bear trash cans available, and having a bear box at my campsite to store my food/trash/toiletries was so much easier than hanging a bear bag. If it hadn't rained, I also would've been able to use the hammock posts at my site (you could use these to hang a clothesline too if you wanted). When I talked over the phone with a ranger, she told me that only a few campsites didn't have hammock stands. If you think a lantern is worth its weight to carry in, there's a lantern post on the tent pad. I loved how level the tent pad was even on a hill. I couldn't figure out how to use the potable water pump, but there are plentiful creeks you can filter water from.
Overall, this is a fantastic campground for a beginner backpacking experience in the real backcountry. Use the Avenza Maps app that the park has its map uploaded into, and you won't get lost finding the overnight parking/self check-in station like I did. Know the gate code of this area before you go. The gate takes a hard push and pull. If you're prepared for all this, you'll arrive at camp before dusk when the wild animals come out. At night I saw white-tailed deer and heard owls and cattle! During the day I saw/heard SOOO many birds on the South Ridge Trail and found a bear track after the Cpt. Morgan Trail on the creek side of Hadow Trail!! If all this sounds awful rather than exciting to you, just drive in for the day and stick to the historic areas rather than venture into the park's backcountry areas.