In reply to AntonSC:
Hi,
Catnip mentioned above is a good rec. Flat grassy landings for one pad, and the bouldering between the crack lines dries fast. The kererra marina ferry runs frequently all summer, but you need to book on their website.
Theres a big boulder by Oban sailing club thats also good for a few hours. Dries fast and a flat landing. Tidal though for half the tide.
If you've got more time, theres a small bouldering circuit in Glen Scallastle, on Mull, which you can walk to from the ferry (so no need for the car). Really lovely gabbro boulders. And offers a nice walk and option for a swim in the river for family.
Theres not much around Loch Awe, unless you're prepared to go full expedition bouldering around the back of Cruachan.
Hope that helps.
Cheers, Alex