When we had floods about 3yrs ago, there was a section of highway that is elevated about 2m above the flood plain. The water was lapping at the bitumen so we had a dead straight road for 5km with 2m deep water either side. The road would stop any chop, it would be like a sandbar that you could sail even closer to than the sandbar at most speed courses ..... about half a metre away form the road.

BUT no wind! I was begging huey for a 40kn westerly !!!!

you could just try Lake MacQuarie in NSW..