Less than a month to go, and I think I may have found a solution to your problem with the in/out referendum.
Why not do what the French, and several other EU members do, and simply ignore Brussels when it suits you. If you were to explain this to the British people, and insist upon a new hard-line approach towards European interference (don't bother trying to get Merkel & Co to change), I'm sure that the voters would follow your 'stay in' advice.
Why not insist that our fishermen keep all the fish they catch, allow farmers to sell all the milk they produce, let's not be told by some cheeky anonymous bugger how many immigrants we have to accept each year, and please ignore Matron Merkel when she tells us how many new houses we have to build (the bloody cheek). It works here in France, so why not in the UK?
Just sign the papers, and ignore the diktats.
Hope this has been of help.
All the best, Cro. (x, for Sam)
p.s. Dave, whilst I have your attention, will you now PLEASE close down the ridiculous Department for International Development (aka 'the bottomless pit'). Thanks.