Phenomenal, Indescribable Great Time!
If you are thinking that you want to raft the Grand Canyon, do it!
My bucket list runneth over just by doing this trip! I can't decide what part I liked better - the camping, the helicopter ride, the stars, the comradery, the hikes, the guides, the plane ride, the views, or the rapids! I can't think of another vacation which would top this.
PS. Seven days were not enough!
Grand Canyon - 6 or 7 Day Vacation