I get this, OTOH what I do on vacation is different.

I rarely go for a swim, except when I'm on vacation. So, I don't regularly use a bathing suit, but I want one in my suitcase if I'm going to the beach. Also, when you're travelling, the kinds of things you eat are different, so you might have digestive issues you don't have at home.

The hardest things to remember are the ones that are always just there when I'm at home: toothbrush, cell phone charger, etc.

It's easier to take off a scuba suit if you don't need it, than to put one on if you need it but don't have one.

My motto is "Semper Paratis"

I can get by with minimal stuff, but I never travel without my Swiss Army knife

From repairing someone's radiator while camping in New Zealand to fixing a broken suitcase in Japan, it has proved invaluable many times

3 French hens

I stopped packing so much. Like the saying goes, "No matter where you go, there... 's a Walmart (or similar)."

Don’t forget to pack your spare sousaphone!

Don't forget your cup mute.

Depends. Are they single, double or triple horns?

Easier then having to deal with slide grease.