In reply to chubbs2:
I was there in September last year. Buttermilks was far too hot for serious bouldering until very late in the day however I had a good time at the Happy Boulders climbing in the shade for most of the day.
The Buttermilks are worth driving out for a look as they are truly impressive in size and you could always climb a v0/v1 highball.
Make sure you stop at the bakers with the British telephone box outside, amazing sandwiches!