According to The Telegraph, these include “Master of the Household department, to oversee catering and logistics, her private secretary and his deputy, a secretary for each of those secretaries and two secretaries for the Duke.”
There are also “two dressers, a hairdresser, a valet, two ladies-in-waiting, an equerry for military liaison, press officers, eight police bodyguards and the Foreign Secretary and his or her staff.”
Apparently, she has been known to take around 35 additional people with her.
It is not uncommon for the Royal Family to take aids with them.
source: express.co.uk