Get the Camera+ app for your iPhone 8. I took my DSLR two trips ago, and used that app for my most recent trip, and I swear I got nicer landscape photos this time around. Portraits are solid, too. It has a focus and exposure feature that really help. The downside is the zoom, low light, and action shots.
Honestly, though? It was a huge relief not carrying the big, bulky DSLR this time around. And I didn't feel like I was slowing up my family as much, either.
ETA Camera+ photo (though I substantially reduced the image size: there is a RAW capability with this app):
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