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.
WEATHER
Ask the local pilots.
Do not fly with a North wind.
Do not fly if you see waves breaking offshore.