I agree that we are getting closer to archived data consumption (vs requiring Internet access) and we'll pack a "data suitcase" prior to extended trips or errands.
I guess it could be considered brown-bagging your Internet diet when you're on the go.
If you’re able to perfectly predict your preferences for every given moment of the period you’re on a cruise or in the air in advance, then you could. I find I am unable to do so.