So I followed space invader one's great guide to link unraid to virt-manager and have converted my disks to qcow2. Snapshots on the disks work fine. I also hibernate/save a VM so that I can go straight back to where I was instead of rebooting it.
The issue I discovered is that snapshots disappear from virt-manager after the unraid host is rebooted. I also had a hibernate fail the other day. These things both have the same root cause I believe, which is that the libvirt folder is stor