you dont have the problem with the camera against the fuselage because you dont have that big air brake under the wing, in other words you don't have as much drag.
by the way for around 100 bucks they were selling a 9/16ths inch square camera that sent signals to a receiver that hooked up to a tv/vcr/dvd whatever good quality video. now this was a couple of years back check it out before you loose your plane and your camera.
if you dont want to do that and the camera didnt work on top the wing how about slingging it from the gear.