People have been saying that UKIP has "peaked", or that "it has run its course" or that it has made some terrible electoral faux pas that will finish it, for years and years and years...and yet, amazingly, it persists, and it continues to grow. It might be more reasonable to say that traditional political punditry is far more out of touch with grassroots voters than UKIP is.
Will the UK remain in the EU? I hope not, and I will certainly be campaigning strongly for the UK to leave, but if I am absolutely honest I think its going to be very difficult. The forces arrayed against the Leave campaign are numerous and very powerful. They are more organised, vastly better funded, and they have all the weight of the establishment behind them. But, if you believe something is right and true, you have to fight for it, no matter what the odds.
Galloway is in a different party, but he was invited, knowing what he was. So, yeah, they are responsible for it, that was just boneheaded.
UKIP may have more members now than it did before its defeat in the last election; the sentiment for the UK leaving the EU may be there, though I doubt it. Meanwhile UKIP holds seats in the EU parliament (which is amusing) but has basically zero influence there. It has zero seats in the UK parliament. But yeah, people who say UKIP has peaked don’t know what they’re talking about.
Regardless, good luck in that campaign. There are members of Cameron’s cabinet who want out, even though Cameron himself probably couldn’t care less one way or the other at best, or opposes Brexit at worst.