The Gibb River Road has a reputation for being "the last frontier" but I was pleasantly surprised. It didn't seem that bad, but our bus/truck had other ideas. After all the rattling and rolling of the gravel all season (May - early October) with no mishaps, we had first a puncture, then a pipe connected to the booster for the handbrake fell off (which meant the brakes stayed on) and necessitated a make-shift, roadside repair, then part of the front wheel guard (about 1 meter long) fell off, never to be seen again, and the fire extinguisher jumped out of its fitting and couldn't be fixed. The back seat was definitely the bumpiest place to be, but we rotated seating so you didn't get that every day. Lots of fun.
The Gibb River. We only crossed the Gibb River when we turned off to go north on the Mitchell Falls Road.