Duke and Dr. Gonzo go on a drug-fueled bender through the city which neither of them can remember. No articles are ever actually written. Dr. Gonzo catches a plane away from Vegas. Duke gets all introspective about Tim Leary for a while, then starts driving back to Los Angeles to be just another freak in the freak nation.
Factual error: The movie is set in 1971, but during the start of the motorcycle race several of the bikes are obviously early 90's Honda CR's and Suzuki RM's. You can tell this from the disc brakes on the front wheels of the bikes and the 90's style plastic fenders and bike colors. Bikes in the 70's generally had metal fenders and definitely no front disc brakes.