In reply to The Ivanator:
There's plenty to do at vs/hvs in pembroke, more than enough for 11 days, but you just have to watch out in case the range is closed during the week.
I would second the suggestion of keeping an eye on the weather, and deciding at the last minute. Cornwall is often better weather at that time of year, so should be a high contender, especially if you haven't climbed there before...