We love Sherkston. The facilities are great, the campground is clean and there are a lot of activities planned on a daily basis. It is a large park with a fresh water quarry that, if you are into Scuba (we are), you can do a dive or two. You also have access to a beach and Lake Erie that you can drive your vehicle on so that you don't have to lug all your beach gear. There are good restaurants on site too so you can choose to cook or not.
It is expensive but in my mind it is worth it. Mid week is cheaper.
If you have any other questions then post them and I will do my best to answer them.