I like the tear and layer shades of blue and bluish gray with vellum for a more realistic ocean. You could use it as a background. If you are planning a number of pages for this trip you could use the tear and layer for each background piece to tie the layouts one to another.
I would choose lots of different papers for the different places. I truly get what you mean by wanting the perfect paper for your trip. I wouldn't limit myself to a specific style. Little Yellow Bicycle has great papers for travel too.