Wow thanks for all your advice!
You've all been really helpful

I think it's hard because as that baby's not here I can't judge whether I'll be breast feeding or bottle feeding, etc! As the baby will be so young I'm going to have to take a sterilizer (if I'm bottle feeding) and think I'll need to use those old fashioned sterilizing tablets(??)
I wasn't sure about rides but thought I'd be ok to go IASW? And then ok to go in attractions like Cinemagique, Animagique and Stich Live, etc?
The other thing I have considered is taking enough nappies and wipes to tide me over but then buying some from the supermarket on the first day, just so they don't take loads of space in my bag? Has anyone done anything similar?
Thanks for all your advice, I think if the baby's bottle feeding pre-made up formula is a great idea, as is taking your own blankets

I don't feel as mad now for planning it!