In reply to Mark Morris:
Thanks, I might take another look at Dinas Rock. I checked the entry on here and it appears to be virtually all bolted now. How things change, I'd never heard of sport climbing last time I went there (about 35 years ago...). I don't suppose it makes any difference if we're only top roping, but I would like to get a couple of (trad) leads in if I can.
Is Boiler slab non-tidal? looks like it would do the job.
Saddle Head looks good, but a bit of a trek (most of Pembroke past Tenby is probably a bit far to be honest), and it's ab-in, which I'm wary taking novices on.
I'll have three to five adults (all family) and my 9 year old daughter with me. Most of them have top-roped with me before, but I would still treat them as novices.