Spare memory cards
You’re about to make some magical memories, the last thing you need is the dreaded ‘MEMORY FULL’ flashing across your screen as you’re about to capture them.
And although memory cards these days have incredible capacities (my dad just bought an 128GB card for his high-quality camera that will hold 19,000 hi-def images), you can never be too prepared. It may seem a little excessive, but I would recommend bringing 3: one in the camera, one spare in your bag (in a ziploc/waterproof bag) and one in your hotel to trade in if any get too full.
Say cheese..!