Thread: Bike transportation puzzle

I carry the bikes (1 roadie and 1 Mountain) on the roof of the D3. I throw a small 2 step ladder in the back of the car. I also have a sign that hangs from the rear view mirror as a reminder the bike are up there.

Thanks everyone for fantastic feedback. That Youtube video link from Marmoset is an absolute winner! I'd love to see him try that with a Discovery!
Thanks to all those who suggested ISI. This looks like the go. Yes I have a tow hitch on the back of the TrakShak and have had an old top tube gripper style bike rack on there before but it wobbled clunked and caused some bike damage due to poor fit between the tow hitch and the receiver (and crumby rack design). However after checking their website I can see an ISI rack and some mods to the receiver working out just fine especially as I'll be able to use it on the car as well as the trailer.
As per EPIC and davidsonsm, I'm coming around to the idea that the roof is probably best avoided re practicality and safety, and I'd rather avoid the drawbar given that despite a big stone guard at front of the trailer, the front of the trailer looks like it has been sand blasted (an awful fate for a carbon bike!).

Thanks again!