Roof rack is out of consideration, unfortunately I learned
after buying my HR-V that only the higher trim level had a roof capable of a rack.
I like the simplicity of something like the Hollywood rack
cyccommute shared but it looks like the max wheelbase is 60" (already long for non-tandem-specific racks, based on my cursory research), while my Santana's wheelbase is 65".
Anyone have info on the
Long Bike Tote tandem rack? Not too many online reviews of it, but it looks like a decent candidate.