I'm gonna go with "this is not a good idea."

1) You'll do just fine without the ferret.
2) The ferret will do just fine, as long as you leave him with a conscientious host.
3) Taking the ferret along is going to complicate your trip and slow you down.
4) A pet A/C on a bike is wasteful.

I say man up. Leave the ferret at home and in capable hands.