couple things Jeff.
1) it is not even the best/toughest course on the property. The Snead Course (which is technically private) but most resort guests can get on is a much better course. It is in great shape, but it is very "resorty" wide fairways, short rough. A couple great holes; i really like the short Redan par 4 on the back.
2) When you go to the Greenbrier, you are usually signing up for a package which can include golf or spa packages; I doubt very many resort guests are paying the rack rate.
3) What I think you are really asking... if i had $300 to spend on a round of golf in the mid-atlantic, I can name 5 places I would play first, many of whom have better spas. Greenbrier is often compared to the Homestead and in my opinion, unless you really like skeet shooting, then choice isnt close.