Well, not on the water, but on a trip in Woodland Caribou in 2015 my wife and I had to resort to sleeping in our Bob Special.
We had converted to hammock camping several years before and so that is what we had with us. We had left Welkin Lake in the morning and paddled through Adventure and Haven, where we ran into old and new burn areas. The old burn had regrowth trees up to 10 feet tall and very few unburned trees large enough to support a hammock. At Haven it started to rain and get very windy. On the port to Jigsaw I had a heck of a time carrying the canoe since there were very few trees left to block the wind. As we topped the hill and got a view of Jigsaw all we could see past the lake towards Wrist was burn, some of it still smoldering.
By this time it was 7:00 pm, still raining and windy and neither one of us felt like pushing on through Jigsaw and the 825 metre portage to Wrist in the hope of finding trees, so we landed on the lee side of a small island to set up camp.
Since we don't sleep on the ground, we didn't have our thermarest pads. We use reflective sheets under sleeping bags in the hammocks for a barrier to the cool air underneath, but these don't have enough cushion to make sleeping on the ground comfortable so we decided that we were going to try sleeping in the canoe. I took the centre thwart out and after rigging up a tarp to keep the wind and rain out we laid out the reflective sheets and sleeping bags in the boat and climbed in to check it out. It was tight, but we were surprised to find that it wasn't that uncomfortable. We first tried a head-to-foot arrangement but found it was better if we both laid the same direction.
The good points were that it was level and there weren't any rocks or roots to dodge. And it was dry! The not so good were the flying elbows as either of us rolled to change position. By morning the rain and wind had let up and we carried on our way to finish another great trip in Woodland Caribou. It's nice to know it's possible to sleep in this canoe, but I'm not sure I'd like to try it in our w/c Canadian without more padding.