You seemed to like the GX7 until you got bit by the 4K bug and caught the GAS that goes with it!
I do agree with you about packing lenses. However, in my case, there are photography missions and travel missions. I've not learned to mix them well. I'm bad company when I'm concentrating on photography and a bad photographer when I'm being a good tourist and enjoying the sights and culture with my DW or friends.
Therefore, the most productive camera I've ever owned is the RX100 that slips in and out of my pocket and mostly stays on auto. I can get "good enough" snapshots or clips without telling my fellow travelers to stop and wait while I shoot. I can do that about twice a day before someone gets POed. If my DW parks me on a bench so she can shop for sweaters or purses, I can switch to more serious photo or video settings. And, I can easily get away with shooting the natives because the tiny camera does not threaten.
If I do go on a photo mission, I can pack the monster GX7, gargantuan long lens and massive tripod. Rather than carry any other lenses, I stuff the RX100 in my pocket.
BTW, I do enjoy the GX7 and it was your nudge about video quality that helped me get past my reluctance to spend money. The "kit lense" stays home. The "regular" lens is a 14-140. The special lens for National Parks is a 100-300 that requires a tripod and sucks for travel.
Someday I will get past my reluctance to spend money and move to 4K. You may be on 16K by then!
I hope your trip is a good one and your travel clips are stunning.