Hummm,
After some new tests, I have decided to do a revised version of Thumb harbour with a smoother ramp, but not soon.
You can try at Sewall PF24, there is a slope from the beach, between the red and white oil drums, the land strip is a little bit short
and also at Victory Valley PF30, between red and white drums, but I haven't test with the Goose, usable with the Kodiak and the Porter floatplane, water line is very short and approach to the river, challenging !
Xavier