Long pontoon with space usually available, although you will have to raft up at busy times. Very sheltered. Rates now (2007) an expensive £19 per night for a 31 footer. Good toilet facilities, but showers cost extra. Good pub grub onshore. (The Victoria is a yachty favourite).
http://www.bluemoment.com/scotmoorings.html
http://www.tarbertlochfyne.com/Howard [Just Imagine] 14-Apr-2009