That was interesting, thanks. The article requires registration but it's a fairly painless process. I will quote a few parts which I think are interesting:
For example, Clementine discovered a deep gash on the far side of the Moon that extends to the South Pole. That structure, now known as South Pole—Aitken Basin, is an old impact crater, more than 2,500 kilometers in diameter and more than 12 kilometers deep in places (relative to the rim)—that is, deeper than the Marianas Trench in the Pacific Ocean. The existence of this giant basin further revived interest in the possibility of polar ice on the Moon.

'Incoming meteorites with mass greater than one milligram are so infrequent on the Moon that we could treat them as individual events in our simulation. Smaller bodies are, however, so numerous that we had to consider their arrivals as a continuous process. Our model demonstrates that the bombardment from meteorites and other loss mechanisms removes most of the ice derived continuously from the solar wind, leaving only about 6 percent of the original amount. Our modeling of these space-weather processes also shows that the water freezing out continuously on the surface gets spread rather uniformly through the upper meter or two of the lunar regolith in about a billion years. Interestingly, we found that over longer periods the ice does not get any more concentrated—it merely reaches to greater depths.
...
The pattern of ice concentration as a function of depth that one would find at a particular spot would thus depend on the history of nearby impacts and whether these events excavated material or deposited it at the site in question. But our numerical model, which we put through some 100,000 randomly arranged runs, allowed us to calculate the overall outcome. We found that on average only about 6 percent of the ice originally delivered to the cold traps remains. Still, this leaves them with about 4 percent water by weight.
...
"Some people speculate that the ice at the lunar poles might one day supply water for a lunar base or be used as a rocket fuel, thus enabling easier exploration of the solar system. Although these deposits might be tapped for such ends, one should remember that a great deal of hydrogen and oxygen is available at lower lunar latitudes too, where it would probably be more accessible to lunar colonists than at the poles. For example, the concentration of hydrogen in the regolith at the Apollo landing sites is roughly 50 parts per million. It could be released by simply heating these materials. Oxygen, too, is plentiful. Indeed, typical Moon rocks contain almost 50 percent oxygen by weight within various oxide minerals. As many workers have shown, some of this oxygen could be readily extracted by heating lunar regolith in the presence of hydrogen. So it is unclear whether future lunar colonists would need to mine polar ice deposits to get their water and rocket fuel. But these deposits will have a unique scientific value, whether or not they ever offer any commercial payoff as an exploitable resource."

I believe they are mistaken in this regard- the poles are probably with all things taken into account more accessible than compared against "lower lunar latitudes".