In reply to Lloydfletch:
I've seen reports of people bouldering at Craigmore recently so I'm guessing it would ok, thought one report did mention a dangerous loose block at sabre crack so take care. Craigmadie might also be good option for you. As well as the bouldering there is an easy low grade crag that you'd be able to solo on. Personally I'd just go to Dumby where the Sea Traverse might be your ideal soloing outing.
Edit: Also some the easy high ball boulders at Dumby would offer a "soloing" experience e.g. Eagle slab problems, Pendulum, Imposter Arete, Snooker Shelf, etc.
Post edited at 22:58