Power trip?? Ahhhh, he doesn't like that he knows he will have to step up very soon and have to serve YOU! That's not a power trip, hun, that's being looked after while you do very important, largely invisible work. He is resisting.
Just so you know, you can do the rest of this journey without him - lots of BB chicks do better by ditching the excess baggage. Hopefully, though, your DP can get over himself and grow up.