hi fellow taikors, how much $$ should i change, or do i need, if im staying in korea for 10 nights... accomodation, lodging all included, 5D meals included, so left 5 days on my own...

food, entertainment, shopping (wont shop much tho)... approx how much is needed? plan to chg around RM2k, sufficient?

just wanna ask those that travel to korea frequently... should i change more korean won, or keep some USD instead? not sure cos have not been to korea =/ do they favor USD usage there, or they prefer won?