If you have a chance go to this web site and check out his HD videos.

This includes the HD version of the Teddy Bear video.

[link=http://homepage1.nifty.com/CUE/]Click me![/link]

He did pretty much what you are talking about using a glow or gas engined plane and gyros all around for stabilization.

It looks like he did this with a 1lb HD video camera mounted to a remotely controlled gimbal, with it's own battery pack.

The videos show two entire sequences spliced together to make it seem as if at times you are looking back upon the whole flying setup.

At other times the head panning is used to move the camera around, and it seems as if he even had enough capacity to add a servo for the bear.

It looks like he did this with a .60 sized plane or larger.

By selecting a lightly loaded plane, with a small camera setup, he was able to do it with a smaller model airplane than would normally be required to haul all of the support equipment around.

With the gyro stabilization this may prove to be exactly what you want to replicate.