
Sources close to the couple tell TMZ ... the intimate event will take place at the Planet Hollywood Resort and Casino BEFORE Jason Trawick's big celebratory dinner.
We're told the owner of the PH -- Robert Earl -- will personally attend the event ... and plans to make a toast to the happy couple.
As TMZ first reported, the pair will then move on to a MASSIVE celebratory dinner at the Chocolate Lounge at the Sugar Factory in the Paris Hotel ... followed by a dance party at Chateau nightclub.