Have just booked to go to Florida next easter, we fly back 1st may (arrive back 2nd). I know that you're supposed to have 6 months 'extra' on your passport, but not sure why? Anyway, my passport expires on 19th November, so a couple of weeks clear of the 6 month thing. Will all be ok with American immigration? Or should I err on the side of caution and get it renewed before we go?