I think the UK public would vote to stay in. There are benefits to being independent, however I think there is a general fear about being out there on our own.
I personally am undecided at the moment. I think the memberships costs are ridiculous (£50m+ per day iirc!!!), when there is so much that needs resolving in our own country. Open borders for EU members has been beneficial in that it has brought a lot of skilled, enthusiastic workers to the UK and of course allows UK citizens to go abroad to work and travel much easier.