Transport to and from water
I wonder about the frame and spring suspension of an old baby carriage. Just the rear axle but full frame with a “ S “ bent bar to connect near the seat. The suspension could be adjusted based on payload weight.
You’ll definitely want to baby the cargo as much as possible, but have enough space for you support equipment.
Oh this just sets the mind to conjure ideas… would love to see the end result of your tag along.
Buddy, you’re young, I hope this is only a temporary setback
Good luck, take care
Don’t get stressed, CAUSE IT !