An excellent series of articles on this subject can be found in "Black and White Enthusiast" magazine.

Tim Ruddman wrote all three articles. He did mention that leaving a trace amount of fixer in the print was beneficial for longevity of the print.

If you decide to tray wash, I would do a test for residual hypo to test if the prints are washing adequately. I would think prints that come in contact with each other continuously would take longer to wash. Just taking a WAG.

It seems to me that critical here is the amount time in the water.

As everyone knows: TEST, TEST, TEST!!!