B.B.
It sounds like you already know about baby wearing so forgive me for stating the obvious, but I would definately stick with a two shoulder carrier. I am using a MobyD and love it. I like the verstility of being able to do almost any carry with one carrier. You can do Forward facing out, forward facing in, hip carries and I think also back carries. For an older baby a Mei Tai may also be good. Baby isn't held as snugly and can't do hip carry. However, you can find easy DIY instructions on-line. I have made five of them for friends. Have a great trip!