AdivingBel
Diver
For warm water dive travel something like a Zeagle Express Tech with a basic harness (no padding etc.) or most any bp/w with a fiber plate and a small wing. For travel you can always add lead when you get there either in a belt or a couple of weight pockets you can mount on the harness and/or cam bands. It travels light and you can expand or contract as needed as long as you don't cut the webbing too short.
If you're talking cold water...you're on your own. brrr 

