this reminds me of my attempt at ERC, there were a few layers of decaying delaminated wood. It blew up on me. The glue does a good job of keeping it together for a very long time, if its just the wood not staying together then it shouldn't be too bad, think of it this way, if people can make laminated bows then the crack would pose the same system of operation right? you could fill it with super glue and then clamp the heck out of it till its got no space in between, that should act as a lamination right? call me on it if I'm wrong but that what it seems like would work. I wouldn't just fill it because then there is glue that is doing some of the work in compression rather than all wood and the glue just serving as a bond.
My 2 cents, for what they are worth... Good Luck!