Rose, I think the point that needs to be proven is that there was usage as a boat storage and launching facility as a
primary purpose, not just that the ramps were there in 1962.
They're saying the difference is the ramps were there in 1962 but only as an
accessory to the cottage renters bringing their own boats to launch, as opposed to someone like me trailering in from out-of-town to launch and park my truck/trailer for the day for a fee (that would be the primary use they're referring to in the minutes).
That being said, I certainly hope your pictures can prove in some way that the site was being used as a boat storage facility.