Again, I think it depends a lot on the particular canoe, the paddler, and to some extent, the paddle (I favor a long bladed ottertail when soloing a tandem).Sorry if I gave that impression, but it must take considerably more energy to turn a tandem boat with a relatively flat rim then it does to turn one that is bow light.
I think you have mentioned an 18' tandem, and I suspect that has a lot to do with what you're saying. The longest tandem I have paddled solo for any distance is 16.5', and most have been shorter than that.
There is one thing besides this length difference I would like to explore, but it's not so much about the bow being light as it is your position in the boat.
When paddling into the wind, we usually say we should move our weight forward to pin the bow. As I mentioned earlier, that doesn't always work for me. But I wonder if that's just because the weight I'm moving is myself, and because of that I'm also moving my biggest "sail area" forward of the center of effort.
You have that same "sail" close to the stern. Even moving forward to bring the bow down with gear far ahead of you, you can still be pretty far aft. Could that be part of why you aren't having difficulty in a headwind when tripping? You have more "sail area" astern?
I would like to try that in the Malecite when the lake opens back up.