Kayakers often enter the river near this area in the Ayance Canyon/Palisades, It looks likes some of the walls with similar qualities (unsure if it's this exact selection, or adjacent cliffs of very similar nature are pretty accessible from the river, either a talus slope, treed bank, or small shore on more open stretches of the river. During lower flow crossing with a inflatable raft might be the most practical than the half a mile bushwhack and rappel. There's some interesting 120 degree overhanging sections towards the bottom of some of these cliffs , although the rock quality seems quite iffy the lower you go as well.