Yes starby, you must set your alarm for the pre-dawn meal, as there is a morning prayer to be said straight after that.
It's not a good idea to eat all night, particularly if you have to work all the next day - and feasting during Ramadan's not encouraged, it's supposed to be a time of abstention, so you feast at the end when it's over.
As mentioned ^ there are exemptions, and people can make the time up later - but it's the drinking that I would find difficult, I get a headache if I'm dehydrated, I drink water all through the day.