Just one quick note: I think TG2 is ultimately going to give you better results, *but* TG Classic *can* animate the two things you want to animate. Water actually animates automatically, and if your camera is static you should see it just moving without doing anything. Cloud position is one of the parameters you can adjust. Terranim and Campath both make this easy. So here's the thing: I don't want to discourage you from using TG2, it's outstanding and we want to see it used in projects like this. However, since you you seem to already have a scene you like, and will need some time to get up to speed with TG2, you could consider using TG Classic this time around. Just something to think about...
One thing I should say also is there are a lot less TG Classic experts around now to give help on it if you decide to go that route. But it's a lot simpler, so that may not be an issue.
- Oshyan