Yes, this is Tom Doak's Rock Creek Cattle Company, in Deer Lodge, MT, and lauded by several GCAers as being 'all that'.
my clues include: 'steer' and 'stock' = cattle, 'boulder'=rock, 'stream'=creek and 'cart-tipping' refers to an infamous GCAer's escapades at
RCCC last year, witnessed by another.
other clues included 'Big Sky'=Montana, where 'Ted Turner' owns a huge ranch which supplies his "Ted's Montana Grill" restaurant chain with buffalo meat.
Didn't know Demi Moore had a place in MT, I know she lives part of the year in Hailey, ID, near Sun Valley.
Was going to mention Shivas' love for the place (better than Sand Hills) & Matt Ward's insistence that the course is right around the corner
from everyone in the U.S., but the course was outed before that.