[tomaz_423]

Thanks Sally, Omatako and others.
As I wrote in my original post: I have been there already (that was in 2002), so I know general location and few details. I stayed in a hotel in Praslin (second largest island) and made day trips around.
The place is amazing - downside is, that too many islands are private and they charge you hundreds of dollars just to anchor there, or not not even allow you to come close to shore. Some islands are also natural reserve in a very strict manner, that no-one is allowed to come close. One mouse or rat from a boat could ruin the few remaining endangered animals living there. But there are enough islands to visit.
I really am looking forward for the trip.
This time I will charter a boat from Sunsail's base.
I will post a trip report when I come back.