Don't Install Oreo If You're Traveling
If you're in the midst of traveling it might be a good idea to hold off on an Android 8.0 Oreo update until you're back at home base.
Android 8.0 has the potential to break the apps and services you're relying on for your trip. Be it business or pleasure. It also has the potential to wreck your phone's performance, something that could be problematic if you're relying on it for business or to get around a new city.
The last thing you want to be doing on a trip is troubleshooting or spending time trying to downgrade to Android Nougat.
If you're traveling away from your comfort zone and your backups, it's a good idea to wait. At the very least, wait until you're back at the hotel and/or in front of a computer.