It's probably worth adding that the raising process is easiest (in my experience) when performed with a little bit of speed. Trying to lift the mast overhead gradually is pretty tough, but if you're inexperienced and not sure of the dynamics it is kind of instinctive to take it slowly, even though this actually makes it harder than it needs to be. This may be what creates the perceived need for the security of a winch. That said, I'm fortunate to usually have someone around to help with the initial lift from the back and to secure the forestay.