By the time this thread is over, I suspect that every bike will be voted off the island at least twice.

FWIW:
• The Pugsley has the most unique functionality, and you're using it a lot, so keep it.
• The LHT, Bike Friday and Thorn are redundant. Pick one, preferably the most versatile of the 3.
• You can easily replace the functionality of the Big Dummy with a collapsible trailer at a fraction of the price.