Some guys above seem to be good at this GSAK stuff.
Here some additional info:
We are a puzzle team of 3 but that doesn't always go caching together. So when we do go together (2 or 3), I make a GPX from all our solved puzzles in the area we want to go caching. I then delete those that one or two other team members already logged and I export that to my GPS as a GPX (Oregon 450). I send that as an attachement by email (taking the GPX I exported to my GPS) to the 2 other team members so that we all 3 only have unknowns all 3 of us haven't logged yet.
Here some additional info:
We are a puzzle team of 3 but that doesn't always go caching together. So when we do go together (2 or 3), I make a GPX from all our solved puzzles in the area we want to go caching. I then delete those that one or two other team members already logged and I export that to my GPS as a GPX (Oregon 450). I send that as an attachement by email (taking the GPX I exported to my GPS) to the 2 other team members so that we all 3 only have unknowns all 3 of us haven't logged yet.