This is my mother, Florence McClain, drifting down the Santiam River in rural Linn County, Oregon, 23 April 1933. My father, Lloyd Wright, took the photo.
They drifted down to the confluence of the North and South Santiam Rivers, where Dad steered the boat to shore and they climbed up a 100 foot/30 meter bluff overlooking the rivers. There, Dad, a closet romantic, explained that he hoped their lives could flow together like the two rivers below them. Mom, a practical and plain-spoken woman, replied, "OK by me." I'm sure Dad was hoping for a more romantic response, but it was still a "yes."
Mom, for her part, had been hoping for several years already that they would get married.
The wedding was less than three months later, 9 July 1933.
(By the way, yes, this is how women generally dressed at that time for a hike or a boat ride or a picnic or any similar outdoor activity. Men generally wore a shirt and tie and often a jacket. I don't know how they did it.)