Originally Posted by
photogravity
What is out there that can hold a wheel or wheels and still keep the tandem from toppling over? I want to basically load the tandem as is, nothing removed. I seem to remember there being something that folks used that would hold down the wheel(s) and keep the bike upright. Remember that my bikes also have fenders and I do not want to remove them to haul the bicycle.
The simplest method would be simply to use straps attached to whatever tie-down points exist.
Although not what you asked, I would use a fork mount but attach it to its base in such a way that the the fork was was supported high enough that the fender was not an issue. This method would be very stable and fool proof.