Ciao! Ho visitato due volte questo posto, una volta con guida, 10 anni fa, e l'ultima da solo. E' una struttura piccola in legno con tante decorazioni. La durata della visita dipende da quanto uno è scrupoloso nell'osservare. Direi comunque dai 20 ai 60 minuti...

Yes there is a fee for all tourists. from memory it's around £6. Also you have to wear trousers or skirts well below the knee or they won't let you in. You must remove shoes at the entrance and suggest you carry them with you in a plastic bag as I had my flip flops stolen from the entrance.

the general area is open & active after 7.30 am the palace has its own enclosed area usually opens at 9am

If You more interested in the history, its very good to read the Book called "The Glass Palace" from the indian writer Amitav Gosh. It describes all the history of these palace and its a very interesting story as well.. Soif You go there, read the book..