>>55831877For the scoutmasters, I suggest an outfit that is somewhere between an adult version of the Camper/Picnicker aesthetic and the Ranger outfits. But customize it to fit the local terrain and weather conditions.
For the elderly man, you can emphasize the military aspect and dress him in fatigues or, depending on how the man felt about his military service, emphasize some other aspect of his personality. The Vietnam War deeply divided the American people and there wasn't such support for the men that fought in it, especially the walking wounded. Did he fight on the American side? Why does he like Grass types? After all, the trees speak Vietnamese.