bunk (up) together
To share a room, bed, or other sleeping space with another person. You two will need to bunk together because we weren't able to reserve enough hotel rooms for everyone. I'll never forget the motley crew I bunked up together with at camp that summer.
bunk up
To share a room, bed, or other sleeping space with another person. You will need to bunk up with your sister because we weren't able to reserve enough hotel rooms for everyone. We became best friends after we bunked up at camp.
bunk (up) together
[for two or more people] to share a bed, a bedroom, or a tent. Shall we bunk together? My tent is big and you can bunk up with me.
bunk up
v. To share a bed or sleeping accommodations, especially temporarily: Before they moved to a bigger house, she had to bunk up with her sister. The campers would bunk up together if it got too cold.