Saturno,
I am jealous sounds like a great place you live in. I am sure if I lived that close to the ocean, warm with lots of sun I probably wouldnt get too much carving done. Where I live we got snow last October and it didnt leave until a few weeks ago and I have about a 15 hour drive to the nearest ocean.
I guess I should stop my complaining and answer your question. I agree with Rick if you quarter the wood it will almost eliminate the cracking, if you want to carve the whole log you can but one thing I will garantee is that it will crack. I dont mind the cracks most people dont. You can carve the wood almost right away I find that green wood it delightful to carve it doesnt splinter and carves like butter.
Hope that I have been of some help and by the way welcome aboard.

Colin
www.geocites.com/partridge_ch