Hey Bryces,
I'm not so sure you should dismiss the monokote hinges so quickly! I have used monokote hinges many times and have never had a problem. We used to use them on our sailplanes years ago, and it was very commonly seen back then. About six years ago, I built a powered 72" span high performance flying wing, with elevons and "clam shell" speedbrakes. All the control surfaces were hinged with monokote. Unlike the gliders, this thing is real fast, so I was a little concerned at first and kept a close eye on the hinges. Well six years later those hinges are still intact, with no sign of splitting or pulling away. When you think about it, the upper and lower monokote are stuck to each other thru the hinge line gap, glue side to glue side.....stick some monokote scraps together that way, and try to pull them apart!
Besides, you don't have to cut hinge slots, you don't have to buy hinges, it's lighter, it's faster, you get nice free control movement, and there are no gaps along the hinge line. There is a picture of the flying wing in my gallery, so you can see how big the control surfaces are compared to yours. Good luck, however you choose to do it!

Cheers, Nigel