In reply to Bobling:
Yes, both halves climb. As do the kids, on their own terms. Although that does mean plenty of discussion on who's turn it is....
Font's fine for non-climbers who like the outdoors, though. My top tip's a hammock.... We also tend to do maybe half a day at the boulders, back to the campsite to let the kids at the swimming pool. One adult could pop back out in the evening (or sneak out early in the morning), but tbh, alcohol is generally more appealling by that point - it is a holiday after all!
In reply to everyone:
Thanks, some really useful suggestions - having tended to climb multipitch trad before kids I don't have much clue on bouldering destinations (or indeed sport, beyond the best known).