Regarding wearing their Sunday best, used to be everybody dressed up for a photo ~ women in their skirts, broad sleeved blouses, pointed hats/bonnets and the men in their best leather brogalis.
We have a number of family pictures where the photographer set up quite a long way from his subjects because you had many adults only 4' tall mixed in with others that were well over 7' tall. Fortunately they stood very still so we can do blow-ups of individuals that are very good likenesses.
You'll notice the photographers in FennoScandinavia had similar problems due to the height differentials.
Do you know of any websites that list the last names of known Saami settlers to the U.S.?