I would not even tow something light with the prius. Even if you kept it to the weight of a few passengers, that would put stresses on the car, the frame and other components that the car was never designed to take. A couple hundred pounds in the passenger compartment is not the same as pulling it behind you up a grade.
That is a world of difference from two bikes.
IMHO
Spike
That is a world of difference from two bikes.
IMHO
Spike