1 Hollands wood in the New forest. If you look carefully you can even find some very secluded spots. But it is a popular site and becomes busy in July/August.
2 Dont know the name, but it is at Tintagel fairly close to the Tintagel Hotel which looks like a castle.
3 This one's a bit special. Blackberry wood (Sussex). Although it does have set "pitches" to camp, these are all in seperate glades in the woods. This makes it feel as though you really are roughing it. The second thing is that they actually encourage FIRES. Yes, you can have a lovely camp fire to sit around (seats and occasional pixies included). But they are booked up for most weekends!