In reply to Frank the Husky:
1) No. Even if the crag was climbable, you’d have trench foot by the time you got there. A dry shod approach in an exceptional spring - like the one we were lucky enough to experience in April 2019 - is delightful. The more typical sustained bog-trot would be a real pain.
2) Traverse right crossing easy slabs from the exit of the main routes, heading for a shallow gully. When this is reached, look down and you should see a situ abseil thread. This is used to effect your escape, and some generous soul had replaced this belay with new static rope, not long after we used it in 2019. The ab is long and covers tricky ground with lots of potential for snagging your ropes. I remember a feeling of relief when we got a clean pull.
I’ve only done one route, but feel quite confident in proclaiming that, if you get the conditions, Creag Shomhairle is ace!
Good luck.
Neil