YOU SAID:
i want to go on a trip down south
INTO JAPANESE
南へ旅行に行きたいです
BACK INTO ENGLISH
I want to travel to the south
INTO JAPANESE
南へ旅行したい
BACK INTO ENGLISH
I want to travel south
INTO JAPANESE
南へ旅したい
BACK INTO ENGLISH
I want to travel south
Come on, you can do better than that.