Locke:
Servant to Write reports and do important things so he doesn't have to
Fake Moustache so he can't be recognised
Wig for the same above reason
Peg Leg as he wants to be thorough on his awesome disguise.
Rain coat because they are going somewhere Warm but Cethgus lied to him and said it was cold.
His datapad full of steamy erotica for those lonely nights.
SW Tinder to hook up on a date
Inflatable armbands
Bucket
spade

Cethgus:
Stilts so he can get on all the rides that have height requirements
Probably a few soft toys as he's not use to sleeping alone
His pet rock
Posters of his favourite boy band so he can feel groovy all the time
Diet pills so he can retain his teeny tiny weight even when eating all the junk food
A servant like Locke did, but only to do the sort of important stuff
A pair of winter boots due to Marcus telling him they were off to a frozen moon.
Inayra smuggled in his backpack
Horn polish
Looking at his wiki pic, maybe just a tshirt.

Marcus:
Hair spray.
Codex on how to avoid being purged as an undesirable
Fake beard
Sombrero
Codex on how to put on a fake accent.
No luggage as it got lost by the baggage handlers.
All the reports Locke and Cethgus are avoiding doing
A tent as they forgot to book him a room
A teddy that looks like himself.
His friend Pablo the pool cleaner.

Sang:
Meditation stone
Pamphlets on how to be a Jedi
End is Night signs
His teddy bobo
A droid to be his friend as everyone else leaves him behind.
Nerd glasses.
His pet Cat
A copy of Jedi Weekly.
A love letter he wrote himself to give him inspiration.
A copy of the Jedi code hidden in a copy of the Sith code

Tasha:
A pair of cute sunglasses
Special nightcap for her lekku
One size too small swimsuit to impress Brente
Lots of romantic movies.
A codex on how to be gray but not too gray people mock you.
A poster of One Direction.
Her special sword that only she can touch.
A manual on how to murder Darkblade
Missile Launcher to take Darkblade out.
Anti tentacle pills

Darkblade:
Anti Tasha spray
Tentacle polish
Japanese tentacle porn
Twilight books
Twilight movies
Poster of Robert Paterson
Vampire Diaries dvds
Codex on how to be a vampire
Team Edward posters
True Blood DVD's

Bentre:
Ball and chain
Wedding brochures
Codex on how to be a married man
One way ticket to tatooine for if things go wrong
Anti tentacle spray
Tasha posters
Book on Twi'leks
Honeymoon money
Secret poster of his true love Sang
All the other summit members work

Locke: an apple (for the donkeys he'll no doubt find), Remington hair trimmer (deluxe edition with ear guard), Consular grade ear plugs (prevents notifications keeping him awake all night)

Cethgus: Remington horn sharpener, Naga Sadow towel (for the sun lounger), Naga Sadow sunglasses, Naga Sadow flip flops, Naga Sadow drinks bottle

Marcus: Iron and ironing board (for his casual attire), Military glasses with false nose and smile attached, Book of useful icebreakers, large hammer to break the aforementioned ice

Sang: Map containing all possible exits, Large spiky thing with a blob on the end, rope to tie down large spiky thing with a blob on the end, Instruction book for Large spiky thing with blob on the end, waterproof cover for Large spiky thing with a blob on the end, Towel (for cleaning large spiky thing with a blob on the end)

Tasha'Vel: Lekku moisturising cream, lubrication gel, applicator for gel, directions for use of lubrication applicator and gel, List of directions for unwanted opinions for use in conjunction with applicator, gel, and directions, complete with schematic drawing as where to place it.

Darkblade: Hair gel, spangly thong, 'Ting' smile cream for the ladies, Book 'existentialism and profligacy: a guide to being sexy', Signed photograph of himself to hand to the ladies, haemorrhoid cream

Bentre: No7 foundation, His and hers towels (not sure if they are for him and Tash, or one of his other personalities), prosthetic sun screen ("only for use on mechanical parts, or parts you no longer require"), Copy of Catch 22

Locke: Pokedex, 9 Pokeballs
Cethgus: Anger management self help book, Horny Bitches XI: The Horning, tissues
Marcus: Sun hat, sun tan lotion, Fleshlight
Darkblade: Nothing, he's too busy being...delicious.
Bentre: Tasha
Sanguinius: Iced Tea, books, electric fan, personal music device
Tasha: Bentre