Unfortunately it was raining miserably when we hiked to Wapta Falls. I think my expectations might have been a little bit too high by the time we made it to the viewing site. We didn't hike all the way to the farther viewing site, but I would recommend it since it seems many of the really good pictures are from there.
At over 8,000 ft be prepared to take your time going up this hike. I tried to hurry and was pretty winded. You cant go up the lookout station as its used for staff only, but you can see 360 degrees around you. Views are similar to what you see at the rim so if you cant go, dont feel too bad.