Hi All,
Bit of info on Orchard Campsite.
I have stayed there with my young son, and we quite liked it. The wooded area is smallish, but with well spaced trees. It's towards the bottom of the site by the river (which you can fish at an additional charge). I think it would be possible to swing a hammock or tarp in this area. The ground is quite bare and a little stoney though.
They allow campfires, which is great, but don't allow you to gather your own firewood (at least not in the high season). They charged us £10 for a wheelbarrow full of seasoned firewood. However I also managed to illegally smuggle in a couple of bags of firewood from home in the boot of the car. (You can drive down quite close to the woodland pitches).
We have only been in the summer months, and whilst it was busy, it didn't seem crowded. This time of year I think you'll almost have the place to yourselves.
In short it's not exactly the wilds of Canada or Scandinavia, but for a temporary option not too far away it's probably OK.
BTW, I'm still happy to lay on some Field Archery one Sunday in the Dunwich area.