In reply to Jon Stewart:
Pembroke really is not 2 million times better than Swanage. It's a lot more immediately accessible (I don't mean geographically), and bigger, but the best Swanage routes are as good.
To the OP: of course you should take cams. A friend of mine thoughtfully tested whether they work at Swanage by falling two-thirds of the height of the crag on to one recently. Turns out they do, fortunately.
jcm