Preparing for the upcoming trip? This will help align your mind. Most of these photos are from the rim or, at least, off the river. I certainly love river trips, but the geologic context of the study area is best appreciated from above.
The slides below can be viewed in relation to a map of where the photos were taken because they are geotagged. Just click on a slide and your browser should open up the online photo album. Click on view album map to see where the photos were taken. Zoom in and notice that Google Maps now includes contours in terrain view. That is cool. Click on view in Google Earth and learn a little more about where the photos were taken.