While there aren't too many climbs in the Sub Gorge, it is a great area for demophobes and atephobes -- if you chose to visit, you will almost certainly have the place to yourself. The two best cliffs are Inyo Mono Line Tower and Silent Pillar Wall, both of which are predominantly shady. Almost all the crags are quite close to the river and have a wild feel.
I would just be plagarizing Marty if I provided a detailed description, so if you don't already have it, buy the book. That said, the SG regular approach is not too bad, class two, and takes less time than say, approaching the Great Wall of China via Central Gully. Silent Pillar has a separate approach and even though it is pretty close to the other SG crags, getting to them from SP basically involves wading directly upstream for a far piece which is a worthwhile experience if you're prepared for it.
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Mountain Project's determination of some of the classic, most popular, highest rated routes for Sub Gorge:
Featured Route For Sub Gorge