Yeah it wasn't us, but the other forum I am on (mudrhino) was talking about it, there is a guy on there that knows the guys that got stuck and there was another guy on there who was up that way for a trip and actually ran into them before they broke down. They got found in the end and all was ok.
We did probably about 10-15 river crossings for the day, some little ones and a few big ones that came up to the top of the front wheel flares, my misses didn't mind the river crossings too much, but she didn't like all the zig zaging and thee bumpy tracks.