I'm also looking at mauritius, the best time to go is june/july - but of course thats when it gets really busy. I get most of my info from kiteforum and people have said it gets _really_ busy on the water at la morne and surrounding areas - such as regularly having 150< poleys and kiters out on the water. I found a lot of comments about it being busy and having trouble with the locals not happy with touro's in the weekends, so I was looking at perhaps the less busy but equally good north-east side.
some have admitted that one-eye and la morne/la prairie have suffered from over-marketing so places like belle mare and trou d'eau douce sound pretty good.
have a look at some of these sites, hope they help:
kiteforum.com/www.mauritiusurf.com/www.kitebeaches.com/kitebeaches/country.php?country=Mauritiuswww.kite2fly.com/www.windguru.cz/int/historie.php?model=gfs - go through the daily wind archives for mauritius and you get an idea of the what goes on wind wise
www.myskyriders.com/en/destinations/home/9/genInfo - skyriders operate on the point at La Morne - they are also known as ClubMistral for the windsurfers so they stock all North gear, however there is a shop there that also stocks slingshot.