Great site. When I was there at the end of March 2008 the conditions were not too strong and were ideal for me to get a bit of experience with thermals. The down side is that this is the dessert and there is sand everywhere. :<(
Access
Public transport works perfectly. Just take bus 121 or 3B from the market in Barros Arana street, near the intersection with Latorre street.
Rules
Ask the local pilots.