As another person posted, the road is very bad and the contrast between shade/sun made a spinal adjustment at the end of the trip a requirement.
We first stopped at Ipsut falls, very nice. Then went up the Carbon Trail to the bridge. It was hot on this side of the river - I'd suggest crossing early in the day (more on this later) and using the North Trail instead, returning on this trail.
The bridge was fantastic - too bad the glacier is receeding. We took a right off the bridge and climbed steeply toward the glacier. We got tired, eventually, snapped some pics and returned to the bridge for lunch.
There, we ran into some other hikers who said that water was coming over a log bridge on the Northern trail. Undeterred, and probably because my oldest daughter refused to go over the "Indiana Jones memorial bridge of death", we went down the north trail to return. Glad we did it - much more scenic and cooler. After running through numerous creeks, waterfalls (including one hidden one) we needed to cross the carbon. One bridge was in serious trouble, with flow crashing it hard. We made a safety line and got everyone across safely, but I wouldn't recommend it unless you have some prowness. I spoke with another hiker who said it was an afternoon phenomenon - as the heat melts the glacier faster, the water level rises and impacts this bridge.
All in all, I was expecting a nice hike but received a spectacular one instead. One hint: the north trail is MUCH nicer than the carbon river trail.