Big firms are done for 2L, but I'd participate in 3L OCI, as firms will hire one or two on occasion if people take offers elsewhere, decide to clerk, whatever.
I'd focus on midsized firms, as well as small firms, and see what you get. Some midsized firms have already hired, but I'd bet many haven't, and small firms are just now starting to figure out what their hiring needs are for this summer.