Using a Mic:

Extra Possible Scene:

Pros: Very fast paced intense scene, many sounds and would be enjoyable to recreate the zombie sounds etc.
Cons: Start of the clip is people singing therefore would have to cut that bit out or somehow get around that without producing dialogue.

Possible Scenes (2-3 Minutes): Pros and Cons

Pros: Many varied sounds that can be recreated, a high intense scene that could be enjoyable to reproduce. Cons: A few dialogue scenes that would have to be cut, could affect the flow of the scene.
Pros: A scene again with varied sounds, could be interesting to recreate each animals sound
Cons: Again dialogue would need to be cut a bit easier in this case
Pros: A very powerful scene due to its very simplistic sound, although not many there are a few key varied sounds i.e tree creaking, mud squelching and horse coming in.
Cons: A much slower pace to the others may not be as interesting to recreate if not a scene that builds tension.  
Pros: A very high paced intense scene with many varied sounds. Few dialogues but can be easily cut out. Many sounds that may be interesting to recreate. 
Cons: Few cons as this is my favourite at the moment

Trying out a Few Techniques

Using Adobe Audition