It's fair to say that the vast majority of Yes supporters would cut their own throats before voting UKIP. For Yes supporters don't want to vote for a bunch of racist, tribalistic UKIP fruitcakes who scare people with talk about an oppressing foreign power, prey upon the political disillusionment of voters and draw support from the fears of the working class and the quiet anger of the middle classes.
Oh, sorry, I seem to have got the words "Yes" and "UKIP" the wrong way round there. Welcome, to the first of many ironies about the Yes movement in Scotland. Of course, the big difference between Yes and UKIP is that Yes leans left politically and UKIP leans right. But both use the same tactics to secure voters - the main one being to promise everything to everybody. UKIP gets votes for making promises to everyone from Libertarian - Conservatives to Working Class Labour with a dislike for immigration. The Yes campaign promises to be a socialist utopia fuelled by big business oil and without raising taxes. Both can't offer anything but contradictions.