I saw a Ranger a couple weeks ago and mentioned this to him. He said these things take time, due in part to NPS regulations requiring a 2-person team whenever a chainsaw is being used, and a general lack of a second staff member being present. There had been a tree across the upper valley road about that same time. It was cut by someone other than NPS staff. And while wood cutting is generally prohibited, cutting trees that fall across the road gets a pass. I talked with a camper a couple years ago who said he always brings his chain saw after having been trapped while inside by a fallen tree some years back. One problem with DIY is that many of us with homeowner firewood sized saws are a bit short in the bar length when an OP tree thunks down across the road.