tbh I have spent way too much on gear over the years and some of it was just a total waste. I learned the hard way at a shoot last summer when my lens took a nasty bump. Unfortunately, cheap glass protectors just ruin the image quality of those nice Sigma Art optics. I tried a budget one and it was not as good as expected... it basically ruined every shot with weird ghosting and flare. Since you are doing a wedding, safety is huge. Here is what I stick with now:

• Hoya 77mm NXT Plus UV Filter
• This literally saved my front element from a scratch once. It is around 50 bucks but way cheaper than a repair.
• Peak Design Slide Camera Strap
• Those Art lenses are heavy as lead. I had issues with my neck hurting for days until I switched to this one.
• Sigma LH876-04 Lens Hood
• Keep it on always. Its basically a bumper for your glass.