Another thing you should know about the Carnai trailer: it depends who installed the bunks. The trailer is just a Hobie Wave trailer, and the AI bunks and mast support structure are sold separately. Working at the dealership, I got the great joy of assembling my own trailer. I was able to test fit the boats before drilling holes for the bunks. The aft bunks need to be all the way out at the edges of the rear support arm on the trailer, and it would not hurt to angle the bows of both boats out a little bit to increase separation. I did not do that, but in addition to increasing separation while the boats are on the trailer, having the aft bunk angled outward a bit would make dragging the boats up on the trailer easier. The amas tend to hit the aft mast support post, so the boat has to be pointed outward a bit at that point to clear it.
I really like keeping the boats on the trailer because it makes it easier to use them. I park it in the shade and release all the various bungees when I'm not using the boats. If you try to launch an AI off the trailer without any bungees holding the amas on or in, the results are...welll...kind of funny if you're watching someone ELSE do it, I suppose...