for this booking, we hopped on the Cozy Olympus cruise. the places you visit are as mentioned in the itinerary. once you board, the guide will allocate a table for you/your group and you will use it for the entire tour. it is more of a self guided tour because the guide will not follow you to all the spots but rather explain to you on the cruise and inform you on the meeting time. if you are going in cold weather, do not bother swimming at tip top island (even though they provide towels). instead, push for the summit if your body allows as it is really steep and crowded. for luon cave, you can opt for kayaking but get ready to be hit by all the other 'bamboo' boats if you are unable to control your kayak. the food on board is decent and served in buffet style. beverages are not included in this package but are still relatively affordable(about 40 to 80k VND, cash only). you actually can get cheaper drinks on some of the islands.