Just read a post in the class a forum with a side comment about the difficulty of running the "trailer" wiring for a toad and thought I would pass along a trick that makes the process fairly easy.
Most newer cars have mounting brackets underneath for the brake and other fluid lines. There is usually at least one free slot in these brackets that will easily hold a 6 or 8 wire 18AWG wire bundle (available at the local Home Depot or Lowe's). Just fish the bundle through the brackets and attach to the car's exposed wiring harness at the front and rear. I drill a hole in one of the trunk drain plugs to get the bundle into the trunk. It really beats removing interior panels to run the wire with the car's factory harness and the sleeve covering the wire bundle provides some extra protection for the wiring.
Hopefully, this is a little repayment for all the help I get from reading everyone else's posts