I realize this post is old but for the record, when I bought my H14 in Halifax, I simply put some inexpensive blankets under it (the hulls) and since my Toyota Sienna had no roof rack, I ran some ratchet straps (ouch) through the sliding doors in the forward area, and through the rear windows (in the aft section) Then I ran some rope from the front and back of the van through the tow hooks to secure it some more. Wasn't pretty and some would not do it but sometimes any port in a storm. The roof was fine. The front sliding door had a tiny bit of paint damage where the straps touched going around the door frame. Probably some duct tape there would have been a good solution. Also where the strap went through the door there was a bit of wind noise and rain of course would have probably migrated through there but it wasn't an issue. My older van had a rain gutter for putting roof racks on.

The rest of the boat was inside the van.

Drove to Montreal (13 hours)

Remember to point the pylons at each other with the round side of the hulls on top so the top is flatter as this will reduce windage.

I have since built a trailer but at the time it was my option.