Bruce's dog is named "Sam 'n Rob", a reference to the director/producer pair of Sam Raimi & Rob Tapert, who have worked with Bruce Campbell on many projects, including the Evil Dead series and Xena, Warrior Princess.
The exteriors for the town of "Goldlick" were actually shot on Bruce Campbell's property where a back lot was built with the exteriors of all of the buildings. The interior shots were all done on a sound stage.
According to the DVD commentary, most of the Bruce Campbell memorabilia in Jeff's room was real, including a spare Brisco County Jr. costume that Campbell owned. A few fake items, such as a poster for "The Stoogitive," were made to fill up space.
One of the townspeople named Frank makes a reference to kidnapping the blacksmith from Army of Darkness. Timothy Patrick Quill, the actor who plays Frank, also played the blacksmith in Army of Darkness (1992). This joke is also used with the Dirt Farmer.
There are many mentions and references to Bruce Campbell's other films. Examples are phrases 'sugar baby', 'groovy' and 'boomstick' along with name checking of people like Sam Raimi (director of the 'Evil Dead' trilogy).
EASTER EGG: If you go to the Special Features section on the DVD and go to the section that contains "The Hard Truth", and click on the kid wearing the hat; You will get a message from Ellen Sandweiss.
During the town meeting, where the Dirt Farmer and Frank are revealed to be lovers, Frank says "I wish I could quit you", which is a reference to the line "I wish I knew how to quit you" from Brokeback Mountain (2005).
Guan-Di is an actual Chinese god. It's an alternative name for Guan Yu, who is one of the most famous of all Chinese historical figures. Embellishment of his character and exploits led to him getting deified within four centuries of his death, and he became a ubiquitous deity in Chinese folklore. Even now, he is still worshiped throughout much of China and in many Chinese expatriate communities. However, he generally represents loyalty, brotherhood, and righteousness, not bean curd. Interestingly, and possibly intentionally, his more common name of Guan Yu can still be heard in the song, "The Legend of Guan-Di," as a pun.
When Bruce goes to look for Jeff he says Mr. Winchester is itching for some action..... The reference is from the famous TV show Supernatural, where the lead characters are Winchesters and they hunt monsters.
The trivia item below may give away important plot points.
The movie references Bruce Campbell's fake-memoir novel 'Make Love (The Bruce Campbell Way)' published in 2005 several times. On the set of Cavealien 2, the actor Bruce sits down next to after the shoot is reading "The Complete Dummie's Guide to Acting", mentioned and pictured in 'Make love' on several occasions. In Jeff's room, there is a poster for the fictitious Bruce Campbell movie 'Death of the Dead'. This movie plays a prominent role in the plot of 'Make love'. The poster as shown in the movie was originally featured as an image in the book. After they survive the monster, Bruce becomes married, and he tells his wife, "Once you make love the Bruce Campbell way, you'll never go back."