Last time I took a smart phone (maps and route recording), and a GoPro, plus my normal lights and wired bike computer.
It worked for me, I have every intention of using that load again. I may or may not toss in a tablet, it was on the original list last time but the battery crapped out with too little time to replace it, and it got left home.
Laugh all you want about the younger generation being addicted to electronics, when I hit routes that had been renamed from what was on paper maps on my last trip, the internet was a really nice thing to have.