There are several points in this funny cartoon that show the time it was set in. Porky is in some city that is the home of a major convention and is overbooked. As the cartoon was 1948, an election year, the fact that the signs around town welcoming some organization that ends with ".o.p" in the initials of the name suggests it is a political convention, like the Republican ("G.O.P.") convention. Also there is a later joke about Daffy and his invisible friend.
The city has no hotel space (one future hotel site has a line of tourists waiting outside and around the block). But Porky lucks out and pushes through a door and gets to share a room, but it is with Daffy. Daffy shows up, drunk, and insists on introducing the tired Porky to his pal, "Hymie" a six foot kangaroo. "Hymie" also happens to be invisible. As this cartoon was released shortly after the play HARVEY (with a six foot invisible Pooka/rabbit) the time frame reference is there too. Like Mary Chase's Harvey, Hymie may actually be there after all - Daffy bounces around the room in Hymie's pouch, only his head visible. Although he demands to know how he does this if Hymie is not there, Porky refuses to believe that Daffy is anything but pixilated (i.e. drunk).
All Porky wants to do is get to sleep - and all Daffy can do is disturb him. He asks Porky to translate Spanish and French phrases meaning "Good night". He gets the hiccups and Porky ends up in a soggy bed (his expression when he first feels the wetness is interesting, as he thinks it is something else entirely - later he calls Daffy "unsanitary" much to the indignant Duck's reaction). Eventually, Porky gets so fed up he throws Daffy out. Daffy returns to wreak his own "tit-for-tat" vengeance). But he is surprised how Porky manages to avoid as hard a landing as Daffy had earlier.
By the way, another point of it's time is the business (repeated in Warner Cartoons for many years) of a train conductor calling "All aboard for Anaheim, Azuza, and Cucamonga." Mel Blanc, the voice of Daffy, Bugs, Porky, Elmer, and so many others in the Warner Cartoons, had frequently appeared on the radio and televisions shows of Jack Benny. His best recalled television skit with Benny were his laconic Mexican, "Sy" who Benny tries to draw into a conversation. He was also Professor LeBlanc, the hapless music teacher who had to put up with Benny's violin lessons.
On Benny's radio program, Benny is at a train station, and we hear Blanc (as the conductor) report "Last call for Anaheim, Azuza, and Cucamonga". Before Anaheim was built up by Walt Disney's Disneyland, and by the arrival of the Anaheim Angels Baseball team (which gave it a World Series Pennant a number of years ago), the town and Azuza, and Cucamonga were just three very quiet, little farm communities that few people ever went to. The entire joke on the Benny show was how Blanc's conductor (every couple of minutes) would repeat the fact the train was ready to leave, but each time he would note (with increasing irritation mingled with angst) that nobody seems to care to go onto the train to Anaheim, Azuza, and Cucamonga. In the end he's pleading with people in the train station to board the empty train.
Warner's never went that far (possibly there would have been copy-write problem with the full use of that joke). But Blanc was able to use a version of the beginning of the joke, which everyone in a 1948 audience would have recognized.