At around 1hr 19min, Buster sees the TV news report of the bottle washing up on shore, then they say it's been traced to a Drivers License, and show the License of a Jonás Cueyatl of Black Sulphur Springs, MT 59642. There is no Black Sulphur Springs in Montana. There's a White Sulphur Springs, MT 59645. There's Black Butte, MT just to the north of that, and ZIP 59645 belongs to Ringling, MT, a bit to the south.
Jonah tells the stranger that all the hotel's rooms are non-smoking, and that he has to have a credit card to book a room. In the mid-1990s, when the film is set, most hotels (especially in small towns) still had both smoking and non-smoking rooms. Also at that time, most smaller hotels would accept cash without a credit card.