Either our characters will remember or we will figure it out in conversation but can you give a basic time frame of which members of the Guardian of the Tide worked with each other and when. Also how those times are related to the dragon encounters and the final encounter when the Guardian was stolen.
Without posting a ton, here is what I have:
In Game:
Wake and Falcon were on the ship together for a year.
Gmax never served with any of the other three.
Grognoth and Falcon served together for several months.
In the time between.
Wake returned to the Guardian and served with both Falcon and Grognoth for a few years before they left and he stayed.