I'd highly suggest doing the "short loop" of Fordyce, I don't think the width would be an issue and it is a beautiful trail.
The full trail would be interesting because of a few spots but doable. Trees would not be your friend on the Rubicon, you would be true tree huggers
Actually since they re-routed the trail go in wentworth and honestly width is not as much as an issue any more. Wentworth is a great campground, then you go till you don't want to go anymore, maybe go back to camp.