You’re going to need memory cards, lots of them! We recommend about 3 or 4 good ones. If you’re looking to buy a more affordable card, the Sandisk Ultra SD 32GB is perfect for you. Something like SanDisk’s 32 GB Extreme Pro or Lexar’s 64GB SD Card & Reader are both great quality SD cards that provide high transfer speeds. (Remember to check that your memory card’s performance matches that of your camera. If you’ve got a high-speed camera you don’t want to be held back by a slower memory card.)
To ensure that you are taken seriously and all of your gear stays safe you should consider getting a high-quality, easy-access camera bag like the Lowepro Pro Runner Backpack 450 AW II or Lowepro Photostream Roller Bag 150. Both of these bags provide enough space for your equipment to stay neat and safe. People tend to underestimate the importance of having an organised bag. You’re going to get overwhelmed if things are a mess so ensure that you pack your bag neatly before heading off.
As you would know, (or will find out) your job doesn’t end when the wedding does. The real work only begins with you sitting behind a screen editing and retouching. Get yourself an Adobe Photoshop CC and Lightroom CC Photography plan subscription. Using these editing tools you can keep your photographs sorted and deliver to your client with quality, printable images they’ll treasure. Another sweet tip is to make external backups of all your work. You never know what might happen with your computer.