This post caught my eye because the canoe was shipped to Raquette Lake in the Adirondacks so I did a little digging and fell down an (internet) rabbit hole...
I am happy to report that this canoe design was probably practical, not political, as K. K. K. in this context represented "Kamp Kill Kare", an Adirondack Great Camp located just outside Raquette Lake (on Lake Kora) - then owned by NY Lieutenant Governor Timothy Woodruff (the name shown on the invoice). The history of the place is quite interesting; it remains in private hands to this day and just recently opened to outside visitors.
You can read about it, and see lots of images of old canoes in the banner images here:
https://www.lakekora.com/about/our-history
Here's an excerpt from that website to put things in perspective:
Tales of the camp under Woodruff’s ownership are that of legendary hedonism in the woods, enjoying the greatest luxuries and most unexpected amusements: gondolas imported from Venice plying the lake, semi-tamed bears kept amongst the cabins, even telephone service as early as 1903. Subsequent owners (the Vanderbilts among them) also indulged certain eccentricities – at one time, tame deer visited each day for freshly made blueberry pancakes; for years, the baseball teams of Yale and Harvard were brought to the property for a few preseason games for the amusement of the owners and their guests.
For those who have time, this 1903 Field and Stream article about a hunting trip to Kamp Kill Kare is an entertaining read
https://www.lakekora.com/library/1903fieldstreammagazinearticlev2a.pdf, which ends with this poem.