Hi as one who ribs to G often during the season its a lovely island and very interesting, good food & drink too!!
I usually come down from Loch Sween so I do not luanch from the mainland side but know it quiet well and as Neil says there is not much in the way of slips on the Mull. Tayinloan is I think the only one within reasonable distance. You could if your rig allowed beach luanch.
Hope you have a great trip maybe bump into you.
J