I too use a Lumix in conjunction with an iphone. The Lumix is a kind of a hybrid between an auto point/shoot and a true digital SLR. Great camera for the price plus it has a Leica lens.
Another thing to consider is how to handle various batteries and chargers while traveling. And, I like regular SD cards for memory and storage and my desktop already has an SD slot. Makes it easy to handle photos once home even though air drop is available if Apple.
I also have a couple of different small pocket size point/shoots and they, like the smart phone, are not that ergonomic and easy to use as compared to a larger camera. Some are so small, with their tiny controls, that they seem unhandy. And you may be asking other people to take some shots, so the camera needs to be user friendly for others who may not have the best photographic skills.