Another Havasu vote
The thwart lace setup and shape are certainly Campways. So yeah, a hypalon Havasu.
I have a picture of a Havasu taken in the '70s and the valves and D-rings are placed differently. I also pulled out photos of my first boat, a Shoshone from maybe the late 70s or 1980, and that has the valves and D-rings in different spots.
My boat was disintegrating and almost unusable by 1991 when I replaced it. Even though this one holds air, worth only a few hundred, mainly for the oars, frame, VW and dog.