My trailer is bigger so I can haul cars, dune buggies, motorcycles, paddle boats, bicycles, extra water and fuel, ...
I ran three lengths of e-track on the floor to be able haul various vehicles based on our current trip and I also have e-track running vertically up the walls to secure other things like outdoor furniture, fuel and water.
You could run two lengths of e-track down your floor for the bikes and scooter and two vertical runs up the walls to secure your kayaks. I use a motorcycle wheel chock for my large sport tourer but just use a three point tie down for scooters and bicycles.