I'm planning a game with a isometric tile engine also and was wondering how to set up the camera in Carrara correctly for this?

Select your main camera. Now on the right sites, you've got the properties window for the camera with different tabs. Select the general tab. Second section in this tab called Camera: right afte that you'll see the work conical. There's a double arrow behind it, pointing down. Click on it and a drop down menu will appear. Now select isometric and you're set.

I've already tried this in Vue but Vue has no isometric camera and it seems a bit more difficult to get the right result there.

I haven't tried this in Vue, but it should be possible also, it work in any other 3D application that doesn't have isometric camera settings:

Use an orthagonal view (such as Front or top). Then all you do is rotate your object 45 degrees around the X-Axis and any amount of degrees needed around the Y-Axis (or Z-Axis with some apps).  For buildings you set the Y-axis to 45,135,225 or 315 degrees depending on the view you need.

 

Artwork and 3DToons items, create the perfect place for you toon and other figures!

http://www.renderosity.com/mod/bcs/index.php?vendor=23722

Due to the childish TOS changes, I'm not allowed to link to my other products outside of Rendo anymore :(

Food for thought.....
https://www.youtube.com/watch?v=pYZw0dfLmLk