All I can say is that I was in PP during the Water Festival from 7-9 November, which is a National holiday just like Khmer New Year, and both the museums were open on those days. Even the website says open on all days. But if there's one thing I've learnt from my trip- Things are pretty uncertain in Cambodia. So may be do a quick check with them.

It's the best attraction in Phnom Penh for me. Enjoy

Sorry, don't know. I'd e-mail each particular place to enquire.

Yes pay at door you get free headset and map on entrance explaining everything very sad google bophana sad stories

Hi there. Download “pass App” it will call you quick and very cheap tuk-tuk. The audio guide at killing fields is included in the $5 entry and no guide is needed. The S21 prison is quite upsetting enough without either a guide or an audio headset. It gets more depressing as you move around. We managed to talk to a survivor-1 of very few. The palace is very overrated the silver pagoda has no visible silver. The National museum is great if you have an interest in Khmer/Siamese historical artefacts and a headset is a good idea here. The old market near Wat Prohm is a great spot...... Hope this helps.

son $5 la entrada y audioguia $3. recomiendo la audioguia.

non saprei, in quanto era tutto compreso nel tour

Je hebt geen Tour guide nodig hoor. Je krijgt audio in je eigen taal en deze is top! (Ik zou wel met audio doen, dit is 1 of 2 dollar per persoon meer maar wel echt een aanvulling.)

Personalmente creo que si es adecuada la visita, si se les va explicando lo que están viendo de una forma que ellos puedan comprender bien. Yo lo he visitado con mis hijos y creo que fue una visita muy instructiva sobre que es lo que nunca tiene que volver a pasar en ninguna parte del mundo.

Hi, I think you can get a guide but the audio guide is very good and offers flexibility when to listen and to what part.