In reply to ianlaw:
The Promontory - Ben Marion etc. - it is reasonably easy to scramble down, but if you want to do several routes it's worth fixing an ab rope. For Long Rock (if approached from above which probably gives you the most climbing time and I think is best) again you will need an ab rope from the top of the climbs, but the scramble down to the top is quite scary and it is worth fixing a hand-line to the stake at the top of the grass slope. Of course you may be lucky, someone else may already have fixed the ropes...
That said, it's been a while since I was last at Baggy, there may well now be some ropes in-situ that I do not know about.
With most sea-cliffs, it is best to go in on a falling tide, if you aim to get there a bit before half tide, you can always sit around waiting for the water to drop a little if it's too high.