We travelled for five hours to get to the park to do the wild gibbon trek. Accomodation was ok. Not great, but what can you expect for the price, and the fact it is run by the national park, as apposed to a tourism operator. The gibbon trek was awesome though. We didn't see any gibbons, but the excitement and dedication of the guide was fabulous. It's nature and you never know your luck, but I think they are managing the tour itself quite well.
The lady at the desk said she would book our bus direct from the park to Saigon - nightmare - don't do it! I would highly recommend getting a taxi back to the main road and getting the big, official buses back to the city. Long story, but basically on an overloaded, not AC'd local bus that took two hours longer than it should, was filled with drinking, smoking locals, and then kicked us off the bus somewhere outside Saigon and shuffled us on to a publi bus where we had to pay again and had no idea where we were going. I get these experiences happen when you travel Asia, but the fact that the national park told us to get this bus, made I feel cheated and very disappointed.
Plus the lady that did my laundry didn't give me back all my clothes, bit disappointing when your travelling light an dryly on all the clothes you pack.
Wud only recommend a visit if you book the gibbon trek, but I think 1-2 days is plenty here.