I'm also looking for a two in one, a tablet that can be a laptop. The best I've found is a surface, and I think dell has some two in ones too. The surface feels like the right call because it's just light enough to be a powerful tablet, but not so power hungry that it's stationary. I think they've hit the right balance here.

It's a shame this form factor isn't so common, and what would be perfect for a vacation would be a Chromebook. It's browser centric which is 98% of vacation related activities.