I've driven close to the intersection once (within about 5 miles), as a passenger riding with an Aunt & Uncle on the way back to Oklahoma from Colorado. My Uncle Jim took some crazy, back-road routes to avoid cities and Raton Pass. I normally go through Amarillo and Raton on the way to Colorado Springs. We would up going through Boise City, Guymon and Canadian getting back down to the US-62 junction with US-83 to go East into Oklahoma.
The intersection of FM-48 and FM-1268 isn't very close to my normal OK-CO road trip route. It's about 75 miles North, mostly along US-83, from the normal turn I take onto TX-256 to get to US-287 in Memphis, TX. It would be a little over an hour long side trip to get to the location, and then do some back-tracking to get to TX-152 to cut across to Pampa, Borger and Dumas.
It's funny that I mention TX-152. Going into Oklahoma it turns into OK-152. There's another interesting movie location along that route, the fart in the telephone booth scene in
Rain Man (1988). It's at the corner of OK-152 and OK-37 about half an hour's drive West Southwest of Oklahoma City. The movie's end titles feature a still photo of a highway sign at that intersection. The APCO gas station building is still there, but it has been closed for a long time. The W.S. Kelly General Merchandise store sign is badly faded, but it wasn't in great shape back in the 1980's either. There's no phone booth there anymore.
I haven't been there. Reading the description, I'm disappointed that the dialog doesn't match the roads.
Not surprising at all. Movies tend to suck at ever being accurate with geography. And they frequently make up pure bull$#!+ when working route numbers into lines of dialog.
Tom Hanks' character in
Cast Away, Chuck Noland would more likely have had great, if not genius-level, knowledge of geography and road networks given he built a career working for FedEx. Then there's all the MacGyver-like stuff he did to survive on the island for years. So the idea that he's going to need help getting directions at the end of the movie is really improbable. But the filmmakers had to come up with some ploy to have Chuck Noland standing at that corner to allow for his chance encounter with the beautiful redheaded artist, Bettina Peterson (played by Lari White, who passed away in 2018).