I don't know if a fleece soaker (pull on style) would be convenient. It requires pulling it off along with any poop it caught in the process, that could create a bigger mess down the legs than before. How about a larger fleece wrap style cover? Or I like the PUL cover OVER the pocket diaper idea. That doesn't sound breathable though, but if he's not sensitive to being a little warm it might work. I love the bummis super brite covers. Super full coverage, it might fit well over a stuffed pocket.
That's true, a wrap may be a better choice. I was thinking mainly about the coverage