Yep, Little Si gets crowded, unless you can get out there mid-day during the week.
Equinox unfortunately has access issues. This was kinda the crag for your grades.
Nason Ridge has 1 5.13, and a couple of 5.12's, but is 2 hours away.
Vantage actually has fun climbs in your range. at least one of each at 12c, 13a, 13b, and 13c or d, all pretty bouldery. Again, two hours away.
Newhalem is loaded in that range. And? Two hours away!
Little Si is your best bet, if your time is limited.