We purchased a slumber pod to bring along on our trip, going to put it over our pack and play to give her a darker space since she’s used to sleeping in a dark room. I’ll also be bringing our white noise machine from home, not sure she would be able to sleep without it.
Maybe try using the pack and play for naps at home as practice for awhile and then work up to bedtime leading up to your trip? If you have a bedtime routine I would bring whatever you possibly can for that to try and keep it similar to home.