This is expensive, ineffective security theater already being abused, which Snowden clearly documented. It hurts tourism, international business travelers with proprietary IP, and working professionals with confidential personal information. Source:https://www.economist.com/blogs/gulliver/2017/02/i-m-derezzed
The "terrifying-men of ill repute" are widely known to use runners (not phones or laptops) for delivering critically sensitive information. Socialized paranoia costs taxpayers a massive amount of money to maintain. This is part of why burgers "can't afford" free health care and have increasing poverty and a widening wealth gap. Good luck avoiding further financial crises with rapidly accumulating "security" expenses and a significantly diminished international reputation for spying on everyone you do business with. Apparently burgers can now be scared into financial ruin.
A cheapo burner purchased at your destination is best if you absolutely need a "personal device" for phone access. Use voip for communication without incurring additional costs. International long distance calls are expensive and just as easily intercepted and recorded as Skype conversations. A burner connected to a local mobile provider is usually cheaper than international roaming fees.
If you refuse to consent to datamining your device for permanent archival, the authorities will confiscate your device and detain you for enhanced interrogation without legal representation. In current year you have zero rights at an international border crossing. The terrifying-men have succeeded in abolishing freedom and fuarrrking up the lives of everyone who travels internationally.
It's most secure to avoid bringing digital devices when traveling and be content with being disconnected. Nearly everyone you meet at your destination will have a phone/internet access anyways, so it's not as if you won't be able to borrow access in the rare event of an actual emergency.
As a "foreign alien" (ie: terrifying until proven politically aligned) you're being screened and monitored to the greatest extent technically possible. Remember that. Maintain eye contact, be polite, forthright, and honest about your intentions. Keep your explanations simple and to the point. As OP mentioned most people working enforcement jobs are poorly paid, politically conservative "adults" with a high school-level education. Keep that in mind while you're being probed for evil thoughts. Simple yes/no answers are ideal. Ambiguity is suspicious. "I don't know" opens you up to further questioning, which increases the risk of you contradicting yourself.
Social media is consensual surveillance. It's has no place in a free democratic society (LALL!). Delete that soykaf if you're still using it. Your real friends are people who you can interact with without being monitored and recorded.