|I think if you definitely have a fleece liner in when he poops, you’ll probably be fine. If you add a disposable liner on top, that might be extra insurance. I would think the poop will come off of the fleece fairly easily with a bit of swishing. If it doesn’t, and is also on the diaper, you could try having a small pail with just a bit of water, and leave whatever has stubborn poop on it to soak for a while. Then come back to it in a couple hours or something and try another rinse in the toilet. Even if its not totally where you’d like it to be, if you put it in your wet bag quite wet, I think that it would probably wash up fine when you get home. (At least you only have 1/day to deal with!)
Have fun on vacation!