I have tried a couple of methods and I have found that simple butt joint with Titebond III works as good as anything. No doubt epoxy would work too. I build some furniture and have found, if done properly, the glue joint is stronger than the wood. So I just make good mating surfaces, apply TB III and clamp it. Then I start carving the paddle. The only ones I have broken, the joint for the most part held together and just as I expected the wood gave first.

I was cutting a 'V' joint in the ends to increase surface area for the glue but I don't bother now. Last one I didn't even fool with tips and so far so good.