Mt Whitney Zone Forums General Discussion Equipment for belay on Willamson chimney?

I'm planning to head up Mt Williamson with a small group in September. None of us have done Williamson before, and while most have plenty of Class 3 hiking experience under their belts and are excited to try the chimney, I suspect a couple will want a belay.

Any suggestions about what to bring to set up an anchor from the top? Big slings? Static rope? Cams (if cams, any guidance on what sizes)? Both me and another person going climb regularly and are used to setting up top-rope anchors off of all sorts of things, but are hoping to narrow down the set of equipment we haul up. I haven't been able to find much online besides comments that people set up a rope sometimes, and it's hard to know what we'll need without having seen the area.