Talon,
Here is a coach's answer, others may disagree.
Bad form is more likely to to allow injury to happen but that's not a absolute! There is a lot of misunderstanding (IMO) about what "form" is and is not. But again, from a coach's viewpoint, getting to good position for the shot and doing it efficiently should never change regardless of the "game" being played.
I see getting to proper position for a hunting shot is exactly the same as getting there on a target range. I like Terry Green's statement that your form doesn't change but your style might. But out hunting, being able to get to your full draw position should be just like the animal being in a "shooting position" If your circumstances don't allow a well executed shot then probably the shot should be passed until you can.
As far as videos, you can take a look at mine:
http://www.youtube.com/user/TheMoebow1 And do a search for Jimmy Blackmon's (Ranger B)videos.
They might help.
Arne