The movie playing on the television when they first enter the cabin is 1964's "The Last Man on Earth" starring Vincent Price.
The creature noises were created using various screams from the cast and crew.
Filmed in 15 days.
If you listen closely to the sound Smith's walkie makes, you can hear a sound effect from the item menu in the Silent Hill video game series. Keating has mentioned in interviews that he is a fan of the original Silent Hill (1999) video game.
The last name on Martin's jacket reads "Matheson."