Marten wrote on Apr 3^rd, 2013 at 3:37am:

I avoided overlapping trips because I think it would create more half-full or empty hauls and those cost would have to be shared. With more paddlers it would work but we may have to hire a bookkeeper.

Agreed.  In addition, the single tandem canoe awating the next crew would also have an additional level of complication.

In the end, simple is better.  (But should it get beyond that, I believe I have ample tools at my disposal to deal with the problem ... and my personal time is not really an issue.)

dd