Don't Install If You're Traveling
If you're about to hit the road on a trip or if you're in the midst of traveling, we strongly recommend putting off an iOS 9.3.5 install until you're back at home base.
Over the years, we've talked to a number of people stranded without their device or their important apps, files and services because they updated to a new version right before leaving or during the trip itself.
If you are traveling away from your comfort zone and your device's backups, it's a good idea to wait to do this upgrade until you get back to your base of operations. If that's the hotel, so be it.
It's probably not worth putting a personal trip, a business meeting or an important business trip in jeopardy to get iOS 9.3.5 and its features on board your phone or tablet today.
It can wait.