In reply to djwilse:
I think West Country Climbs is your best bet. Additionally, you then have a copy of WCC for crag info in Cornwall, Dorset, Avon etc, too. The Climbers club guide is comprehensive and includes a lot more but most of these are culm 'esoterics' and probably not great for the family. There's more than enough to go at in the rockfax guide and if you do fancy Valley of Rocks for a chilled, non-tidal afternoon, you can get by with the information and crag descriptions on the crag page on UKC.
While I do agree with Cusco for not recommending Compass point and Gull Rock, I think Vicarage could be worth a day out. There is a grassy/scree section to get to the beach (in-situ rope), but the rock on the seaward climbs is high-quality and I'd say more solid than some of the top outs even at Baggy Point. Box of Delights (HS 4b) has an in-situ chain anchor at the top (as do a couple of others) and is a really great climb. The landslide there a few years ago has put people off but if you can stick as close to the sea as you can while on the approach I don't think it is any more dangerous than other culm crags. As a general rule of thumb just be extra alert at any of the culm crags.
There's some nice bouldering at Hartland Quay too, with PDF guides online. Maer Cliff (aka Northcott Mouth) also has some good bouldering and some shorter routes away from the big scary main cliffs. This crag isn't in Rockfax but there's enough info on the Javu PDFs and UKC for a day out.
Enjoy it!
Ollie