> So you plan to (1) actively/proactively conceal your data/evidence

I am not concealing data/evidence as it doesn't exists. I don't know of any law in any country that force you to hand out the key of your home to a remote state so that they can enter your country and do a search.

> and then (3) constantly restore from cloud backups?

Why constantly? Only and only if I need to access specific data (that may be available remotely without restore anyway). Full restore only when going back in my own country.

It's been normal operating procedure for many employees that travel to the US. You think they're all criminals?

Border officials don't have the right to search all of your data.

You are also not under any obligation to have it on your phone at all times.