One more ski gear point. You really do need ski wide skis if you ski the Big Boy trees at Timberline. I know the Snowtime guys won't believe that one.
My fairly stiff 76 mm Elan 666s get really exposed (and so does my technique) once the main lines get cut-up or if I start hitting the really tight spaces to get the freshies. With deep uncut pow (as in last year), I could ski pretty much ski any line (and did) in the Big Boys on the 666's. Obviously, last year was an exception. A softer, wider ski really helps when busting the cut-up or when gorilla-ing tight turns at low speed. Also, twin tips are useful when backing up to hit a new line. My trusty old Pocket Rockets (90 mm underfoot) are a good tool. Only disadvantage is that the bases are pretty much removed, so there is not much base layer until you hit the core.
There are lines in the Big Boys to challenge any ability level.
SCWVA is pretty much skiing the same ski as the PR's.
Wider, less stiff skis will also suffer less base damage when you hit obstacles.
As posted earlier, I personally wouldn't take 1-2 year old skis into the Big Boys.