Diddy -- When in Vegas ... Bring Extra Protection!

Diddy wants to leave the fighting to the professionals this weekend in Las Vegas, so he's taking extra precautions to make sure he doesn't get into any trouble during his Mayweather/Pacquiao party.

The rap mogul is once again hosting a huge after-party for the fight at the Havana Room & Beach Club at the Tropicana -- but Diddy wants this fiesta to go smoother than his Super Bowl event ... where he got into a fight with a pissed off fan.

According to our sources, here's Diddy game plan:

-- his VIP section will be far away from normies (unlike SB weekend)
-- 20 extra security guards to watch over his VIP section
-- guards instructed to immediately toss anyone heckling Diddy

Mo money, less problems ... that's the goal, anyway.