Lodges in remote places commonly sell a rate that includes breakfast and dinner. The arrangement is not a package upsell; it is what supplying a kitchen at that distance requires.
The supply run is the limiting factor
A kitchen an hour or more from a supplier receives deliveries on a fixed schedule rather than daily, and the run is expensive whether it is full or not.
Ordering therefore has to be planned against known covers, because anything unused sits until the next delivery and anything short cannot be replaced.
Knowing in advance how many people will eat, and roughly what, is the only way to make that ordering work at a small scale.
Included meals convert uncertainty into a count
If dinner is optional, the kitchen has to prepare for a number it will not know until the evening, which means either waste or shortfall.
Including dinner in the rate turns the room count into the cover count, and the room count is known days ahead through the reservation system.
That is the whole mechanism. Half board is an information device before it is a hospitality one.
A fixed menu at a fixed hour follows
A single sitting concentrates the work into one service, letting a small kitchen team cook once rather than across a long evening.
A limited or set menu reduces the number of ingredients that must be stocked, which matters when the storeroom is the whole supply chain.
Dietary requirements are usually collected at booking for the same reason, since a substitution has to be ordered on the delivery run rather than improvised.
Staffing at a distance reinforces it
Remote properties often house their staff on site, which means the operation carries the cost of accommodating the kitchen team as well as employing them.
That fixed cost makes a long, thinly attended service uneconomic, and pushes the operation toward one concentrated meal.
Staff meals also come out of the same kitchen and the same delivery, which is another reason the menu tends toward things that scale.
What it means for a guest
The practical effect is a schedule: the day is bracketed by two meals at set times, and returning late means missing one.
Full board appears where even lunch has no alternative, and packed lunches replace a midday service where guests are out all day.
The useful question before booking a remote property is not whether the food is good but what the nearest alternative is, because that determines how binding the schedule will be.