when I did my motorcycle license lessons I had to ride around three islands in a boat launching parking bay.
The three islands were configured so I needed to do almost 180 degrees around them then head to the next one, fang around it then onto the next one. The little course was shaped like a 3 leaf clover only a bit oblong. It was used to teach riders how to shift their weight into corners and initiate the turn in. Maybe you could find a bank of islands to use as a mini test track