Next time I do an event similar to this I will try and remember that the more photos I take the more time it will take to go through, edit and tweak them. In retrospect 2000 photos might have been a bit excessive ;-)
Permission and consent for kids in any public event is a bit of a jumbled nightmare. I researched it and was told a lot of different things in advance by different people about the legal side and the moral side of taking shots of children with or without their parents permission. So, I took consent forms with me to ask the parents/guardians but quickly realised that group shots of kids in the 'kids' area could not be done that way.
I then found out that something was written on the ticket/website that said that photos were being taken for event promotion etc. and that I was able to take pictures of anything without worrying about my forms.
In the end, I just went with asking the parents if they were around and the children if not... most people were okay with it anyway although I did have the occasional tricky customer, which is frustrating when you are just trying to do the right thing!
If I was to do it all again I think it would go a lot smoother but I was happy with the resulting photographs so that is the main thing. There are loads of them but I have chosen a few of my favourites...