I'm much more of a novelist than a short story writer too, but I feel I got a lot out of Clarion. I would highly recommend it.
(The networking and post-workshop support is as much a reason to go as the actual writing instruction.)

All of these are very competitive. I know with Clarion, at least, they have many more eligible candidates than spaces, and I'd imagine that Odyssey is the same. It's very easy to be good enough to get in, but still not secure a space. If you were to apply to the Clarions as well, you'd have more chances.