Is it possible to remap the movement keys for the PC version? I've seen conflicting reports online, and I can't find any options in the game for changing key bindings. I want to use the arrow keys for movement, and remap the camera to something else. Anyone know how?

Should be able to. Start game and select options then using the arrow keys at top to select Controls then click controls at the bottom which should bring up your keyboard control functions. Just click to highlight the ones you want to change.
Of course you`ll have to remap the camera up, down, right, and left as well since they are mapped to the arrow keys. Maybe use the camera as WASD. Just a thought.

Very easily

You can actually do this quite easily, reset the keys, press numlock change the camera keys to numpad1 etc, turn numlock off then change the remaining keys as you want. I used this post by Kemeral.

https://www.youtube.com/watch?v=Ns3DBvFlXYw