I got lots of pinstriping last year on Kane Creek so our less hardcore members might balk a little at that. There's also the tippy spot at the beginning where Gill tried to drive off the cliff that would be intimidating to some of the newer folks.
Elephant Hill is a long day to do it all, but as all have said out standing scenery. A easier trail with breathtaking views is Top of the World and if some of the really brave want to spice it up on the way home you can always go out via Rose Garden Hill. Dome Plateau is on the other side of the canyon from TotW and equally good if not better views, but can be easy to get off track in all the roads back there.