Depends on the climb. Lots of folks like or use a static for TR set ups, Annapolis Rocks and Black Rocks included. I would typically use a combo of that with some nuts and passively placed hexes to set up climbs. Cams are easy too, but if you don't have any you can do a lot with BD nuts 5-13 and an old set of hexes. Some climbs have trees close by, some don't.
If you truly have no trad gear to take with you, carry more webbing. Many of the climbs can be set up sans pro, but the natural anchors (trees/boulders) are well back from the edge. I carry a 30 meter static line and have yet to find a climb I couldn't contrive a top rope anchor for.