Honestly

If you read the Lonely Planet guidebook, which is always a debatable practice, it warns of one classic scam which involves tourists asking a tuk-tuk driver to go to the Grand Palace, at which point he tells them that it is "closed", and ferries them to his brother's jewelry shop. Yesterday, our intrepid visitors Nikki and Mark headed off to the Grand Palace, only to be told by a nice young man at the river ferry pier that it was closed today. They phoned me up, and I said, oh no, I've read about these scams, he'll be lying. So taking my wise advice, they take the ferry up the river and trek all the way up to the Palace gates.
Needless to say, it's closed for the day for a special festival.