Cruise from Seattle to Alaska and listen to a bunch of lectures on climate change (while the diesel motors hum).
Prices aren't too bad really, nearly half of what I guessed. August 7-11, 2011.
"INSIDE CABIN (J)
From $1270 per person based on double occupancy ($2400 for single occupancy). Add a third or fourth person to the same cabin for another $740 per person. "
If their information is accurate...it is worth a little diesel if it will increase public awareness. However unfortunately I figure they will be mostly preaching to the choir.