Variations of "Greasy Grimy Gopher Guts" I've heard from scouts in my troop, and camp staff:

Here we sit like birds in the wilderness...waiting to be fed.

Here we sit like flies on a garbage pail...waiting for the rest to come.

Here we sit like flies on a kybo seat...waiting...

Kybo (pronouced with a long I in first syllable) is what the camp staffs around here call a latrine or porta-potti. It stands for Keep Your Bowels Open.