Need help finding a horror movie

I have this horror film in my head that I wanna get back to, just can’t remember the title. Maybe you can help me.

So, plot is, there’s this couple that came across a small remote texas-like town. But the guy got murdered while they were in there. Years later, the girl became the leader of the town, but now taking revenge for her man, to those bypassers on this said town.

I don’t remember this movie having any a-lister actors in it. It was probably release around 1990s to early 2000s.
I might be mistaken about zombies, but I’ll just the term. They may be just creatures.

Notable scenes:

  1. Girl was having s#x with the guy but her face fell off.

  2. A dude was so stoned, one of the zombie or creature convinced him to cut his arm off.

  3. While the lady leader was having s#x with one the victims, she also decapitated the guy after she saw that that guy was flustered that her face fell off.

  4. I (vaguely) remember that there was a zombie guitar solo near the end of the movie, while their city is on fire.

  5. Another vague memory, one zombie blew up from fireworks.

Trailer Park of Terror?

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