Hi Lars and Roland,
Got your message Lars and how's it going Roland.
Quite busy today to find enough time to write so i'll respond to this in the next day, there are some cool spots along the lake shore and it's inexpensive there. Malaria especially during the rainy season can be a hazard but if your immune system is strong and you have a healthy diet this will keep your resistance up.
Bilharzia from the worms that come from the waste products of the Lake snails is a problem around Monkey Bay (south shore area and a few spots) but i know some spots where it's Bilharzia free.
To my knowledge the majority of the Lake is croc and hippo free, more crocs on the Mozambiqican side. never heard of any attacks, very rare sightings....
That's your dangers...
I'll write more about some spots tomorrow, when I was there a few years back, i was scuba diving and snorkeling remember, not freediving....
