Cat must knows?

my younger cousin is going to be taking care of my cat for a month while i am out of the country. any must knows i should tell her?

so far i have lilies are EXTREMELY poisonous and to keep things he shouldn't eat out of sight completely.

additionally i will be bringing: his favorite comfort toy bed/tree where he sleeps everyday his carrier which is his safe space + his blanket litter box litter genie litter matt water fountain second favorite toy food plates/stand wet food supplements feliway diffuser one of my hoodies and one of my bf's hoodies for familiar scent

anything i should add? any advice on how to make him comfortable in a new house? my friend said to start him in a small room. he's been to the house twice just to get familiar with it.

thanks in advance!