Yes, there's little doubt that a rural population that has grown up using guns and hunting can wreak havoc on a larger, conventional force using guerrilla warfare tactics. History abounds with examples of this.

As for "guys with guns from Wal-Mart" in the US, let's not forget that we have tens of thousands of experienced returned officers and NCOs, who are very knowledgeable about guerrilla warfare and who identify very strongly with that rural population base here in the US.