I haven't been to the Ashland Jellystone, but we have been to
Jellystone campgrounds in other states and they are excellent. Very friendly staff, very good family experience. They cost a little more, but the kids love it.
KOA campgrounds are also good.
Stay WAY clear of "
Happy Camper" campgrounds.. It would be generous to say that the places are dives!
If you're looking for a great family-friendly campground near Concord, NH... try
Oxbow Campground in Hillsboro, NH. They have a very clean, family-friendly campground. It's gated and the owners are not afraid to turn away anyone who causes trouble. They have a fishing lake and a swimming lake and usually have events each weekend. They are 30 min from Concord.