En route to Reno while riding in house trailer, thieves put on gloves and begin wiping down interior so their fingerprints can't be traced, but in following scenes, before they've reached destination, are no longer wearing gloves and are touching everything.
At one point, Kerwin Matthews, as Ronnie, tells Brian Keith, as Brick, that they are not technically robbing the casino as they will eventually give the money back via anonymous tip. But, this is why they should have consulted Guy Madison, as Al the pre-law major. He could have told that anything of value, taken by illegal coercion, is technically a robbery. Plus, they would also be subject to legitimate arrest on the charges of attempted robbery and conspiracy to commit robbery.
At one point Ronnie talks about how the archaeologist Schliemann "dug up the ruins of Troy in Greece." Troy was in Asia Minor, in modern Turkey, not in Greece.
In the convertible on the way back to college from Reno, Roy comments that they are "in Kansas somewhere" (with "300 miles to go") but the mountains in the projected background are too way close for that.