I went up to the boulders today semi-inspired by this thread as the weather was looking ideal. Not the most successful day though... The whole place was dark, wet and moss-covered. With most of the boulders being on the south side of the glen theyve not seen sunlight in a month or more. The heather bunnets on the big stanes provide a fairly constant runoff too which puts the likes of Dan V's line out of action. I ended up scrubbing a few lines, had a play on some holds, slipped off topouts with handfuls of moss a couple of times and gave up. I probably should have known better but the idea was lodged in my head. Worth exploring anyhow.
I wouldnt recommend a visit any time soon. I reckon they need a good dryspell and more sunlight in the glen for it to be any good (same for Glen nevis). If youre near Sunart though Ardnamurchan has a some good bouldering about. The beach wall at Sanna is lovely and im sure theres loads of rock to explore in the hills. The other bet might be to take the Loch aline ferry over to Mull and head to Erraid or Loch Buie? The Mushroom Boulder is absolutely class.
All the best for the trip.