There is parking near Karakter for access to the beach between the Boon and Karakters. To park and go to Simpson Bay Beach (KimSha) park in the lot by Captains but not much open space there either anymore - personally I would
Never swim there - but that’s me!!! You can park in the lot at Mullet and walk to open areas between Rosie’s and Kalatua (but there is now water sports set up as well - or past Kalatua and still open space available. Or go to Plum or Longue and there are lots and no problems with chair set up anywhere. Or Rouge the beach is yours.