How many other people will be on your boat

The smallest boat we track has four cabins. The largest has fifty-six. Both will sell you a night on the same water, in the same weather, stopping at the same caves, and the median price of boats with ten to nineteen cabins is $31 a person below the median for boats of thirty or more.

Fourteen times the size, and the bigger boat is the cheaper one: Prince, with four cabins, starts at $205 a person, two sharing, and Diana, with fifty-six, at $168, though across the fleet the biggest boats run a little dearer. Almost nobody chooses on size.

What the fleet looks like

Cabins	Boats	Median rate per person, 2 days 1 night
9 or fewer	5	$205 (3 priced)
10 to 19	19	$139 (18 priced)
20 to 29	39	$148 (32 priced)
30 or more	24	$170

The median across the 87 boats we publish is twenty-two cabins. Cabin count is not passenger count, and no operator in our set publishes the second figure, so double it for a rough guess and treat the result as rough. A fifty-six cabin boat is carrying something near a hundred people. A ten cabin boat is carrying twenty.

The price column is the point. Between the ten-to-nineteen band and the thirty-plus band the median moves $31, on a product where the cheapest boat we publish is $105 a person and the dearest is $402. The smallest boats sit apart: only three of them publish a rate, at $128, $205 and $290, too few to call a pattern. Whatever you are paying for in Ha Long Bay, it is not the number of strangers at breakfast.

The number that looks backwards

We classified 7,104 written reviews by subject. One of the subjects is whether the guest remarked on how many people were around them, favourably or not.

Boat size	Reviews	Mentioned the headcount	Share of those in a negative review
14 cabins or fewer	1,252	9.3%	6%
15 to 24	3,404	7.1%	13%
25 to 34	950	5.3%	14%
35 or more	1,488	4.2%	17.5%

Read only the third column and you would conclude that small boats feel more crowded, because their guests bring the subject up twice as often. That reading is wrong, and it is the sort of wrong that ends up printed.

The fourth column shows what is happening. On the smallest boats, 6% of the people who mention the headcount are writing a negative review. On the largest, 17.5% are. Guests on small boats raise the subject because they liked it. One writes that the ship is quiet since there are only ten rooms. Guests on large boats raise it because it got in the way.

The same flip shows in the bad reviews alone. Among one and two star reviews, headcount comes up in 6.1% on the smallest boats and 12.9% on boats of fifteen to twenty-four cabins. Twice as often, from the people who were already unhappy.

What else changes with size

Two other subjects move steadily as boats get bigger, and both point the same way.

The crew get mentioned in 89% of reviews of boats with fourteen cabins or fewer, and 71% of reviews of boats with twenty-five to thirty-four. On a small boat the crew are individuals with names. On a large one they are staff.

Kayaking gets mentioned in 12.3% of small-boat reviews and 5.2% of the largest. We cannot tell you whether that is because big boats run fewer sessions or because a kayak launch for a hundred people is less memorable than one for twenty. The gap is real either way.

The rate of one and two star reviews is lowest on the smallest boats, at 3.9% against 4.8% to 5.7% elsewhere. It is a modest difference and we would not build a decision on it alone.

The catch

A small boat concentrates you. Twenty people, one deck, one dining room, two nights. If the group is wrong, or one couple is loud, there is nowhere to go and no other table to sit at. On a forty-cabin boat you can disappear, and some people book precisely for that.

Small boats also carry less public evidence. Our smallest band rests on seven boats and 1,252 reviews, against twenty-two boats and 3,404 for the middle. Nineteen of the 87 boats we publish have no collected reviews at all (counted 12 October 2026), and several of those are small. A quiet record is not a good record.

And the amenities thin out. A boat with four cabins may have a spa room, but it is not carrying a pool deck and three bars. If your idea of the trip includes wandering off to a sundeck that is not the same sundeck you had lunch on, you want the big end of the fleet, and you should not read the numbers above as an argument against it.

One more limitation worth stating plainly. We have not counted anybody. These figures come from cabin counts the operators publish and from what guests chose to write, not from a headcount at dinner. A boat can sail half empty in a slow week and the cabin count will not tell you.

Common questions

So what size should I book? If you want the crew to know your name and the anchorage to be quiet, book under fifteen cabins and accept a shorter amenity list. If you want space to escape into and a full deck of facilities, book over thirty and expect to queue at the tender. The money will be about the same, which is what makes this a genuine choice rather than a budget decision.

Are small boats more expensive? Mostly not, and that surprises people. Boats of ten to nineteen cabins have the lowest median of any band, $139 a person, against $170 for boats of thirty or more. The three boats of nine cabins or fewer with a rate do run dearer, at a median of $205, but three boats are too few to read much into. The band tells you less than the individual boat does.

Does a small boat mean a private one? No. Private charter is a separate product and a different price. A four cabin boat still sells cabins to strangers.

How does this interact with which bay I pick? It mostly does not, which is useful. Bai Tu Long has the fewest boats on the water, so it is the quiet option regardless of the size of the boat you are standing on. Our bay comparison has the counts.