In reply to Dave the Rave:
> To be honest, I'm not going to do it
Glad to hear that. I mean, you probably could do it, but you'd need to pack a *lot* of coaching and practice in to the next few months.
I have a copy of the Scottish "50 Great Sea Kayak Voyages" book here.
All the described journeys around that area look fantastic, btw, I'm hoping to tick some of the easier ones this year. (I don't have much kayaking experience but I'm working on it - off to Anglesey this afternoon to do a 5-day course with Phil Clegg. Woo, exciting! :O)
One of the voyages described is a three-day trip from Arisaig out to Eigg, around the islands of Eigg and Muck and back to Arisaig again. It gives 6-7 hours for day 1, which heads out from Arisaig over to Kildonnan for a quick leg-stretch and then anti-clockwise around Eigg as far as Camas Sgiotaig.
That's assuming a competent paddler in a proper sea kayak, not in a particular hurry and doing a bit of sight-seeing but also being a bit canny about the timing with the tides.
If you really want to know, you could try a post on UKRGB.