@Verenamon As Ishitar said, people with Die-hard Packet have a tour on that evening, but we only got one hour and a half or something like that to go from the airport to the hotel, do the check-in, and then from the hotel to the castle... And if we have to walk half an hour to reach the castle... maybe we won't do it in time

But we will try to do it all the same!
HASTEGA! (if someone of you knows Final Fantasy X

)
@Wus Well, actually I can't understand dutch very much, but some parts of that site can be translated in english

I checked that site to find out some usefull buses, I found out that number 61 goes from the airport to Lisse, is it true? So if it will be too late to join the tour, we will take the bus and save some money... But if we'll have enough hope to be there in time, we will try by taxi
I read on the Castlefest website that there will be a special shuttle going from Hillegom station to the castle, maybe with this one people will be able to get there without walking that much... but I don't think it will be active the day before the festival...

I don't know the location... is it safe to walk in that area at night or it would be better to avoid it?
And another question (thank you for helping me with all this complicated planning things! Thank you so much!!!), is there a bus from Lisse to the centre of Amsterdam?