Stay patient
Grow up. Both of you need to be tolerant and understanding. Quit thinking about your wishes only. Selfish people won’t get along since they will be constantly arguing even about the smallest things. Control your emotions if your partner annoys or irritates you. Discuss the things.
Being flexible
The trip is arranged for both of you. Remember that and do not make the other one feel less important. Your interests are as important as your partner’s. Flexibility can help you avoid trouble. Put up with some certain things, but do not let your partner use or abuse your kindness. Try to be polite, but do not be afraid to express your opinion and wishes. After the trip you are supposed to come back home happy and relaxed rather than sad and frustrated.