Mayweather/McGregor celeb fans are gonna be screwed out of prime Strip parking if they swoop in last minute ... because Vegas doesn't want the private jet s**t show that went down for Mayweather's last fight of the century.
You'll recall the famous pics of McCarran International Airport tarmacs choked with PJs in 2015 for Mayweather/Pacquiao. That traffic jam taught 'em a lesson. Airport sources tell TMZ, McCarran's implemented a reservation system.
The bad news for latecomers ... the lot's just about full.