We usually drive to/from the mooring but, if you have the time, travelling by coach is by far the more relaxing way to travel. Also, you see so much more from the elevated seating position.
Have bus pass, will travel.......
I applied for mine last week, should arrive next week.
I've been looking into the bus option too. Apart from the start and end of the season when the car is full of stuff, it usually transports only me, a wee bag, and a lot of air. Petrol being the price it is, it is my greatest expense after berthing in keeping the boat. The train from Glasgow to Oban bizarrely takes longer than the bus! Getting to Craobh is a bit awkward, however, with quite long waits at either Oban or Lochgilphead for a connection, then a walk for the last mile unless catching the school service. I do, however, intend to give it a try.