Well my first attempt failed, because it refused to copy directly onto a host that was managed by vCenter. I had to do it while vCenter was offline, because when I connect directly to vCenter it doesn't show vCenter as a possible target VM to migrate, so I had to do it directly from the source host. But with vCenter offline, it won't let me copy onto a host without vCenter's permission.
Now I'm taking one of the hosts out of the cluster so I can use it as a target for the converter. Started the conversion, but the link between the datacenters is pretty slow so it's going to take a couple hours. Hope this works. Thanks for the help!