TLDR: Buy an extra battery and a fast SD card. For a wedding, you dont want to wait on the camera to save files or have it die mid-ceremony. I use the SanDisk Extreme Pro 128GB UHS-II V90 SDXC because it handles the T5 resolution without lag. Also, get a spare Fujifilm NP-W235 Rechargeable Li-Ion Battery. Thumb grips are fine but basically non-essential compared to power and storage right now.

Saw this late but honestly, protect that screen first thing. Scratching a brand new display on the first day out is the worst feeling ever. Also, since you asked about thumb grips, they basically give your thumb a place to rest so you can hold the camera one-handed without it feeling like it's gonna slip. Super helpful for weddings where you might be holding it for hours. In my experience, these few things are total lifesavers:

• ULBTER X-T5 Tempered Glass Screen Protector 3 Pack
• SmallRig X-T5 Thumb Grip 4066
• Giottos Rocket Air Blaster Medium Grab a cleaning kit too. Dust on the lens or sensor will totally ruin your photos and you wont even realize until you get home and see big grey spots on every shot. It’s better to be safe than sorry with a new piece of gear like the T5... it's a beast but it needs a little love.

Been thinking about this since I saw the post earlier. Im with you on the batteries, but unfortunately, the stock strap is not as good as expected. I had issues with it scratching my neck for hours... felt so flimsy. I switched to the Peak Design Slide Lite Camera Strap Black for actual support. Also, grab a SmallRig X-T5 L-Shape Grip with Silicone Handle for handling. It feels way more secure.

Yeah, the battery and card advice is spot on, but unfortunately, people often buy the wrong ones just to save a few bucks. I tried using some cheap off-brand batteries once and they were honestly garbage. They didnt even last through a short session before the camera started acting glitchy. It is super frustrating when you think youre prepared and the tech fails right when you need it. Regarding the cards, just watch out for the speed ratings. I had issues with a card that was labeled fast but couldnt handle the high-res files this camera puts out. The lag was so bad I missed a key moment because the camera was still busy processing the previous shot. Definitely not as good as expected for a pro-level body. A few things that werent worth the hype for me:

• The SmallRig L-Shape Grip for FUJIFILM X-T5 felt way too bulky for my hands
• Thumb grips that block the dials and make it hard to navigate menus fast
• Generic neck straps that feel like sandpaper after two hours of shooting Since youre doing a wedding, prioritize comfort over aesthetics. I spent way too much on accessories that looked good on social media but were basically useless in the field. Ngl, that 300 bucks will disappear fast if you buy junk that breaks before the ceremony even starts.