I was too young to go by myself Issy (my parents couldn't be arsed and my nana was too infirm), but I did send them a letter wishing them a long and happy marriage My reply from the palace is in my parents' downstairs loo.
I was 17 and went up with a gang of friend. My Mum and Dad were wildly patriotic and were keen that I should go.
It was wonderful -the crowd was so happy and we all believed in the fairy tale marriage - well who wouldn't at 17..
I still have the scrap book and all the papers that I collected about the Royal wedding.. I even have the Ladybird book that was written about it.