HOLY COW, that looks like it worked!!!!
I'm in the process of deleting the snapshots now (as instructed) but the server booted up and the additional data from the snapshot is there. As this was the DHCP server, I don't want to bring it back online during business hours. I'll readd it after business hours and report back if it's ok (though I suspect it will be).
THANK YOU AGAIN! If I can buy you a beer / coffee / etc, PLEASE let me know.