Don't Install If Are Traveling
It may be tempting to install the macOS Catalina update right away to test out new features and using the iPad as a monitor while you are on the go, but if you are traveling for work or pleasure you shouldn't install yet.
There are too many things that could go wrong, leaving you without a working computer or without easy access to your backup and reliable internet connections.
If you are on vacation, just wait and upgrade when you get back. If you are traveling for work, don't chance an upgrade that could leave you without access to files and apps you need.