Often, these fanfictions also include the idea of growth in their relationship. They might face some small challenges during their honeymoon that help them understand each other better. For instance, if they get lost while exploring a new town, they have to rely on each other to find their way back, strengthening their bond in the process.
In Naruhina honeymoon fanfiction, there are often elements of fluff and sweet moments. For example, Naruto could surprise Hinata with a special dinner he prepared himself. Or Hinata might find a unique way to show Naruto how much she loves him, like writing him a heartfelt letter and leaving it for him to find during their honeymoon.