If you're looking for a no frills, quiet, beautiful park like setting in northern New England, try Champlain Adult Campground. Here's the URL
http://www.champlainresort.com/index.html (can't seem to figure out the link thingy, sorry).
This place has acres and acres of grass that is maintained like a golf course. Sites are sort of randomized so it feels very natural and adapted to the setting. No arcades, pools, tennis, golf, or kids for that matter, just grass and the lake front. Access is really easy and the owner escorts every rig to its site.
I whole heartedly recommend it but don't go there if you're looking for anything but peace and quiet.