A DigitalOcean snapshot will retain everything as it is at the moment you take the snapshot, so destroying and recreating a new droplet from the snapshot will put you back exactly were you were. You will need to update the A record in the DNS file, though.
The other method is to follow the instructions @Falco mentioned.
But, before you do any of that… anyone can find the IP address of your site if they know the domain name: