A few nights ago I ordered a Sony HDR-CX100 High Definition camera. It has good quality in low light situations so thats why I bought it. Make sure you read up on the canon gl2 to make sure it has the right qualities that would suite the hunting conditions.
I would suggest a wide angle filter for your lens. A strong carrying bag for your camera would also be nice to carry into the woods with you. Unless you are planning on making a DVD or something, a microphone probably wont be neccessary. Alot of cameras already have mics in them. There just not as good but they will still work.

I would also HIGHLY reccommend buying an memory card and extra battery and make sure its charged when you go into the field. It would really suck to run out of battery or loose memory if you have a monster buck infront of you.