I was offering a different perspective with regards to mrbigg's idea. Make sure you use a drill bit that's nice and sharp. That way it won't try to wonder and it should drill a clean hole without cracking the trailing edge. Do you know what the thickness is of the wing's trailing edge? Some ARFs have a pretty thin TE and there isn't hardly enough wood for the hingepoint to grab. You'll also need to make sure there is enough height to the trailing edge to use a hingpoint that's of adequate size. It will probably be best to drill where the slots are cut because there's a chance the manufacturer beefed up that area a little. In case you decide to go with CA hinges, I've used Radio South's 1/4-scale CA hinges on planes up to a Great Planes Wagstaff Extra (glow powered) with no problems.

Dan