From stuff I've read in the past, but cannot 100% confirm.
1) Either putting heat or ice blankets around the flowers to bloom at just the right time.
2) During tourney week each hole has the same number of maintenance guys that a typical entire course would have.
3) Put dye in the water to get it to look just right, (except when it rains and goes muddy, tough to control that)
4) Double and triple roll the greens every night and every morning.
5) And from peeps on here, nary even one weed can be found on the property...
P.S. I'm assuming they have all the housing areas staked off and monitored....but who knows from all the legendary stories I've heard of people behaving, maybe this isn't even necessary.