I have to disagree on one small note:
For a travel router most hotspots are going to be 2.4Ghz; so the dongle, with its better rx/tx is best used as the client and the Pi can use 5Ghz (or 2.4 but 5 does not go through walls well so less snooping in on it) in the hotel.
I should have checked: the 3 has only 2.4.