Hello PJ, have you tried calling the Uist Outdoor Centre
just across the water from you ? They have a RIB which they use for training or if you like I am sure they would train you in your own boat.
Uist is also a nice place to visit with plenty places to cruise around and stop for lunch. The sound of Harris has loads of cracking islands to have a wander around.
Lochmaddy is only 16 miles from Dunvegan, or is it 12 ? I forget. I have been our RIB to Stein from Lochmaddy in 30 - 40 mins on a calmish day..
Give them a call and I am sure they would be glad to help.
P.S where in Skye are you ?