How to ascertain no period during vacation while on HRT

Periods had stopped. Got on HRT (progesterone pills, estrogen patch and cream). Periods started again. Will be going on vacation in a month and do not want a period then. What do you do? Stop all HRT? Or just keep only the progesterone pills? Or stop all HRT but start taking birth control pills without the week-break (which my friends did in my youth before going on vacations to avoid periods)? Thank you for any advice.