Grand Canyon rafting/western U.S. road trip

I am going to be going to doing a road trip and hitting Grand Canyon, Yellow Stone, a dude ranch in Montana. One of the things I want to do is raft the Colorado river but I am having trouble finding a short trip that still has white water. If anyone knows and places around Grand Canyon state park with in a few hinder miles that has half day white water trip s do share.





Also if there is anywhere in that area we should check out besides what I shared please let me Know.