Here's a clever/clean way to randomly position geometry.

random.jsx

function Noodle() {
  const { viewport, camera } = useThree()
  const { nodes } = useGLTF('/worms-transformed.glb')
  const [geometry] = useState(() => nodes[`noodle_${Math.ceil(Math.random() * 4)}`].geometry)
  const [speed] = useState(() => 0.1 + Math.random() / 10)
  const position = useMemo(() => {
    const z = Math.random() * -30
    const bounds = viewport.getCurrentViewport(camera, [0, 0, z])
    return [THREE.MathUtils.randFloatSpread(bounds.width), THREE.MathUtils.randFloatSpread(bounds.height * 0.75), z]
  }, [viewport])
  return (
    <Float position={position} speed={speed} rotationIntensity={10} floatIntensity={40} dispose={null}>
      <mesh scale={5} geometry={geometry} material={material} />
    </Float>
  )
}