I just created a Tor .onion service for Coofer Cat. I was only doing it for the fun of it, but my word it's easy. There's lots of proper documentation on t'internet, but here's how to do it:
1) Install/run Tor somewhere near to your web server
2) Edit /etc/tor/torrc and enable the hidden service
3) Restart Tor
4) Look in /var/lib/tor/hidden-service/hostname for the name of your hidden service.