Remove soffit / refrofit attic rafter baffle vent
I don't recommend it. You'd have to undo the fascia at least partway (and remove the gutter, where applicable) to drop the outer ends of each panel. This means pulling nails carefully so as not to dent the metal, removing the fascia, then pulling nails or staples from the soffit panels (into the subfascia). You'll want to precisely align every nail hole on re-installation to avoid problems at the end of each section. 

It's not difficult for a patient person, but it's time consuming and putzy. If that's not you, expect to have dented and bent up metal before you're done.

You might be better off doing the attic belly crawl unless there's some reason you can't.