Hopefully everyone is running rivers in decent sized groups. I like to teach creeking protocol in my novice classes, basically don't hang out on the eddy line and don't leave your nice safe eddy until you identify your next eddy and it is clear. Unfortunately, some boaters don't follow this program and occasionally we all blow a line. This is where a plan B route is also a good idea to identify.  We also talk about how best to organize a group for maximum safety and speed going downstream.