Cat Ba ventures was a great experience. The boat trip was wonderful, they had very professional guides and it was a very scenic tour.We were fed very well - a huge shared lunch which catered for vegetarians if you let them know in advance. You could buy beer, water and soft drink on the boat at decent prices.
Our half day trek included a guide who took us to the hospital caves and to the national park. We weren’t expecting to go on motorbikes, but felt pretty safe. Once we got to the caves and the park, we found that the other visitors had driven themselves there by motorbike without a guide.However, our guide was lovely, knowledgeable and told us funny stories so overall it was worth paying for his services.