There were a few pagies where I actually needed help. I just asked my girlfriend to look at walkthroughs and give me hints instead of plain solutions.
I'm still playing world 5 and missing two pagies in Hivory Towers (including the one in the ventilation shaft) so there might be more I need to look up - I'm trying my best to 100% the game without help, though.
(Still hunting for world 5's "special" treasure... I hope to stumble upon it while questing but there are fewer and fewer pagies left for me to get
btw... Is there a hidden in Hivory Towers too? Or are there only 5?