That camper went as far from home as the Adirondacks, but usually we'd drive it to Hamlin Beach on Lake Ontario for the weekend, which was a lot closer to home.
One day I found a real shell in the water, and it was the greatest treasure ever. We had a picnic lunch and somehow during the aftermath, my shell was lost. I may have cried.
Somewhere in the boxes in our basement today, I bet I have beach glass from that place. I never did find another shell, but in those pre-recycling days, I filled buckets full of those little frosted bits of blue, green, white and brown.