That's quite a boat! I don't know as I've ever seen so small a boat with a paddlewheel, & it certainly does appear a jib could be flown from the bow mast. How interesting. It looks like they might have been participating in a 4th-of-July boat parade, maybe? When we lived in Groveland/Pine Mountain Lake, the 4th-of-July boat parade was a big event. We had a Hobie Cat at the time. One year my husband decorated it with a whole mess of balloons. I stayed on shore to take pictures & I kept hearing this "pop, pop, popping" sound. Yes, you've guessed right. When he came back to shore almost all the balloons were flat limp things just hanging there. Ruefully he admitted penny balloons were probably not the best choice for his decorations.