Tim,
I've had a couple of trips there, but not for a few years. I've only done a few 13a's there, but done loads from 12a up to 12c/d. The grades felt fairly soft, but that might just be down to liking the climbing style - (virtually) no hard moves, just pumpy. A selection of the best crags/routes in my opinion, plus some I didn't try but look amazing :-
The Motherlode
Chainsaw Massacre (12a)
Ale-8-One (12b)
Rocket Dog (12b)
Resurrection (12c)
Tuna Town (12d)
Team Wilson (12d)
Convicted (13a)
BOHICA (13b)
Torrent Falls - if it's open again
Bare Metal Teen (12a)
Steelworker (12c)
Racer X (12d)
Left Flank
Mercy, The Huff (12b/c)
Dinosaur (12c/d)
Table Of Colors (13a) - didn't try this, but looks stunning
Stunning The Hog (12d)
For the grades that you're after, I'd maybe concentrate on The Motherlode and some of the areas nearby. I've not climbed there, but The Darkside and Bob Marley look superb. Some of the other crags I've been to have stacks of excellent routes in the 5.11 and low 5.12 range (Military Wall, Roadside, Skybridge Ridge), but not much in the higher grades. One other route I'd definitely recommend is Orange Juice (12c) at Funk Rock City, but it's kind of a one route venue if you're climbing harder stuff.
Hope that's of some use.
