You should wear a throwaway set of crap clothes, and buy ten new pairs of everything when you get to Kao San.
You can buy whatever you want here.
You can literally buy fake IDs on the street, college diplomas, throwing stars, brass knuckles, sarongs, dresses, breathable shirts, Calvin Klein rip off underwear, earplugs, power adapters, books, jewelry of all kinds, chopsticks, keychains, fingernail clippers, statues of Buddhas and dragons and so forth, flip flops, sandals, mocassins, shoes, suits, fried bugs, fried rice, phad thai, mangosteen, beer, buckets of booze, viagra, valium, laughing gas, these glowy things you throw way up into the air that spin as they fall, Starbucks, scorpion on a stick, Coke, coke, tattoos, henna, tourist visas, piercings, chopsticks, ping pong shows, obscene bracelets, flowers, laser pointers, luggage, and probably prostitutes, though there are other parts of town for that sort of thing.
So don’t bring anything, because you can get more than anything here.
And I guess I should start spelling it Khao San, cause that’s how it’s supposed to be spelled.