Doesn't appear they quite made it.
I would guess the muffler is under water, if they didn't keep the revs high, it would stall and leave them in that position...
After a long day on the road,they are soaking the spokes,to tighten them up.
Thanks Jay -
It looks like they are almost FORDing the creek!
It often appears that owners of cars especially Fords in those days looked at them as more of a machine to move them and their stuff to and from wherever than a product that was used to move around a bit faster than their horse and cart.
Loading them down with lots of gear tied onto any place they could and then setting off in any direction road or not.
A regular feature in early Australian newspapers were stories of people (often 6-7 adults plus gear)who set out in their Fords loaded up to travel thousands of miles, usually having never driven a car before and successfully completing the trip with virtually no problems.
Yet today most balk at driving more than a few miles unless there is a vulture trailer following!!!