Aut cum scuto aut in scuto
Yes, yes it is. Yellow River, by I.P. Daily.
...recamemry not what it has been; thought the author was I.P. Freely. In any event, Willy Makit wrote a well received prequel.
The air in the tires will keep them afloat. But they could use outriggers.
They're peddling through sewage if that's China.