Kerri Green, who played Jennifer Chester, dubbed Aubrey Jene, who portrayed Laurie Chester. As such, both sister characters were voiced by the same actress. As such, it is kind of ironic that Jennifer tells her little sister to "Stop saying everything I say!". One must wonder whether or not that dialogue was included as an inside joke.
The Florida resort tourist town of "Citrus Cove" featured in the film is fictitious and does not really exist in real life. The sign for this fictitious town which is actually located right before the "Johns Pass Bridge" on Madeira Beach.
First leading role for Canadian actor-comedian John Candy in a sole American Hollywood production. This does not count Going Berserk (1983) which was a US-Canada co-production but which was mostly a Canadian enterprise.
There are several movie posters seen when Sandy and the kids go to the theater. The movies being advertised are: Airplane! (1980), Dragonslayer (1981), Uncommon Valor (1983), Footloose (1984), and Top Secret! (1984). Not surprisingly, all these movies were Paramount Pictures productions, the same studio that produced this film.
This was not the first time that actors John Candy, John Larroquette and Lois Hamilton (the woman who played the Chesters' next door neighbor - and kept showing everyone her newly implanted breasts) have worked on a film together. They all appear in the comedy Stripes (1981).
First of two consecutive films directed by comedy director Carl Reiner that featured the word "Summer" in the title. The second would be Reiner's 1987 pic Summer School (1987) made and released about two years after 1985's Summer Rental (1985). Both movies were produced by the Paramount Pictures studio.
From the American Film Institute: "According to Army Archerd's 7 May 1985 'Just for Variety' column in [Daily Variety] as well as production notes in [the Academy of Motion Picture Arts and Sciences] library files, the inspiration for the film came from an incident in which producer Bernie Brillstein had rented a beach house, and 'returned one night to find the house crawling with uninvited guests-invited by Bernie's client John Belushi, who, in soaking wet and sand-filled trunks, was sleeping in Brillstein's bed.' With some variation, a similar scene was incorporated into the 'Summer Rental' screenplay."
When the lifeguards that lived next door were all going to the beach, one of them says, "He looks like John Madden". He is referring to John Candy's physical resemblance to the NFL, Oakland Raider's head coach (1969-1979).
This film was shot in March 1985 with filming wrapping around April and quickly going into post-production with Paramount releasing the film in August. This would be the first with such a quick turn around schedule to be released that year with the surprise hit, Commando Starring Arnold Schwarzenegger being the other which was released by Fox in October after a quick shooting schedule.
Karen Austin and John Larroquette, who both appear in this film, co-starred together on the eventual hit television series Night Court (1984). Larroquette was still on the show and was still filming episodes while this movie was in production and Austin's character on the show was eventually replaced by actor Charles Robinson for the second season.
The bridge the Chesters cross over as they enter 'Citrus Cove' is at John's Pass between Treasure Island, FL and Madeira Beach, FL. The bridge was recently replaced (opened Dec 2010) as part of a road-widening project. It also widened the channel and increased clearance for marine traffic. Building the foundation was particularly difficult because the current at that location is extremely strong.
The radio announces the temperature is "at 105° F, climbing to 110. This is a record high for this day." Temperatures in Florida never get that hot (other than 'feels like' temperature) due to a combination of the humidity, sea breezes, and almost daily afternoon thunderstorms.
In this film, John Candy's character's name is Jack Chester. Later, in The Great Outdoors (1988), he played Chet Ripley (who also suffers mishaps during a family vacation) and in one scene he is called "Chester" by Dan Aykroyd's character, to which he angrily replies "Don't call me Chester! Call me that one more time and you're gonna go home with a dent in your forehead!"
Portraying family head Jack Chester in this movie, actor-comedian John Candy would also later play a character with the same first name, as Jack Gable, in 1991's Delirious (1991), which was made and released about six year's later.