I'm seriously considering a partially faired convertible tandem recumbent trike from Greenspeed in Melbourne.
Preliminary plans are in for the vehicle in tandem and solo configurations.
The Slides are available. Photos are also available. Advogato seems like an interesting place. I have added myself to the community. The first 500 KM to Dawson City looks relatively easy, on blacktop, but the last 700 KM looks like it is unsealed road.