Careful recording to the camera, you'll want to make sure you are on batteries, not plugged into the wall and if you have to cross power cables with your audio cables to cross them at 90 degrees to eliminate.
I do this and have to remove (inverse wave) a sound print of my camera (full spectrum hiss). I get the sound print by recording a minute of dead air to tape with no microphones connected at all.
Off Topic: If anyone knows why my XL1s is hissing, please PM me with a solution. Or if someone else has the same problem, maybe we could experiment to fix it.