Hi there,
first of all, hope you all have a good time. Im 99.9% certain you will
When i went this year we took around 600pounds, and came home with a couple of hundred.
The year before, my other half had a bad accident at work so couldnt come, so i went with my young brother who is 13, and my little lad who was 3 at the time, and we spent around 400pounds for 2 weeks.
Ate and drank when we wanted, basically we got anything we wanted.
Id say as it is your first time and you want to experience some of the good trips, take around 800pounds, but im sure you will come back with a couple of hundred even if you have been on many trips.