I got 69715 but taking another picture and transferring it to the computer is too much of a bother. I think this game should be renamed HuWiggle or WiggleZero. Because wiggling is exactly what you've gotta do. It's murder on the thumb.
Hints: Always try to be pressing a direction. Never go straight. It also might help to be closer to the edge of the track. Also get a robot thumb as this will quickly destroy a human thumb. You might think to try a TurboStick, but the TurboStick sucks balls since it is one of the worst sticks ever made. Maybe try a different stick.
This caravan nonsense seems to only be on the PC Engine. I've never heard of it elsewhere.