The Woodlands site doesn't allow tents and the pitches are very secluded from each other. The forestry's other site in the same area - Christchurch - is completely different. We went to have a look and there were tents and LOTS of kids yelling and charging around.
The only downside to Woodlands is that there isn't a toilet block only chemical disposal points so if you want to use a loo other than your caravan one then you have to go to Christchurch which is only a short walk away. But if you want peace,quiet and seclusion, go to Woodlands.