I want to be let into Canada without issue, so am taking a burner smartphone connected to a non-critical gmail account that is plausibly-maybe my "real" personal one. But not really. The maximum threat to me is detention, or more likely, refused entry. If I am asked to unlock the device, I will.
Crossing back into the US, I am less concerned. If I am asked to unlock the device, I will NOT. The maximum threat to me is semi-indefinite detention, and I know at the end of it, I can reach out to the EFF to seek representation in a larger action.
Does anyone else have any tips/tricks/ideas here? I realize trying to subvert any Canadian border search is not a good idea, but it's a good middle-grounds vs. "don't go to Canada" or "give them all your private data", I think. On the other hand, I am willing to be more stringent with the US border because (A) I am a citizen, I cannot be refused entry, and (B) this is a cause I would like to participate in, so invite any negative outcome caused by my refusal to unlock the device or share any logins.