The one thing I would say, the hull is a displacement hull, it will suck down into water at speed, I would expect that it will have it's fair share of downforce. I would pay good attention especially up front that it can not work it's self away from the plane, nor slide backwards allowing the front straps to loosen..
I am not sure I would put it on backwards, I would start by slinging it up under the belly to see where it wants to settle.
My thought to not carry it backwards is the stern being wider may have more affect with airflow out of the cowl and may end up being closer to the exhaust. Maybe backwards is right, you will answer that the best.