Hey Christophe,
I added some images to your post. Sounds like a blast. NWS is favoring Sunday over Saturday at this point although weather wise the weekend is still a long ways off and things can readily change. Hope it comes together with epic conditions on Saturday.
This doesn't sound like a piece of cake at all. There may be quite a bit of tacking involved and hanging in for the long haul. A lot will come down not only to the wind speed but more importantly the direction. The more northerly or southerly the wind, the harder the making to windward might be. I wish I was going to be able to come this weekend, sounds like a hoot!
Have fun and take pictures!