Synonyms of 'hole up'
If you hide or if you hide yourself, you go somewhere where you cannot easily be seen or found.
They hid behind a tree.
If you shelter in a place, you stay there and are protected from bad weather or danger.
a man sheltering in a doorway
Thesaurus for hole up from the Collins English Thesaurus
If you hole up somewhere , you hide or shut yourself there, usually so that people cannot find you or disturb you.