I advised my daughter and then-future son-in-law that something would go wrong with the wedding and that they should be ready to adjust plans as necessary.
What went wrong started with my youngest daughter waking up at 3:00 AM with a fever of 101.7° F (38.7° C) on the day before the wedding. I was so sad for her and expected the virus to have her in its grasp through the wedding day and beyond. Fortunately, after many prayers and sleeping much of the morning, she was feeling much better the same evening and was able to enjoy the wedding rehearsal and dinner afterwards.
That rehearsal dinner afterwards (at our house) became the next issue. The food was all out and everyone was ready to eat (and hungry), but ... the rolls needed to hold the main course were missing. Apparently an assignment was missed and a 40-minute round trip to the grocery store ensued, resolving this relatively minor issue.
As I mentioned, I was (mostly) not photographing this wedding, but received a request to "just" set up a video camera. I assembled the gear I intended to use (multiple cameras, tripods, mic, sound recorder, Pelican cases, extra batteries, etc.) the day before (amidst plenty of other chaos) and ran a gear check late in the day. I planned to use the Canon EOS-1D X Mark II as the primary camera, recording the entire ceremony in 4k. Strangely, when attempting to record video with this body, all I saw was black. After checking for an installed lens cap multiple times and verifying that live view worked in the still photo modes, I resolved to call Canon CPS in the morning, hoping that there was some obscure setting I had missed. Unfortunately, the phone call determined that the camera had a failure of some sort (I was not surprised by that news) that was preventing the shutter from opening in video mode.
So, it was wedding day for my daughter and the primary camera I intended to record video with had failed. This is the perfect example of why a backup camera is mandatory when photographing weddings and other important events.
I had a 4k-capable Sony a7 III with a Sony FE 24-70mm f/4 ZA OSS Lens, the focal length range I needed, sitting on my desk. That setup was untested, so I opted to double-record using a Canon EOS 5Ds R and Canon EF 24-70mm f/2.8L II USM Lens. I set up the two cameras immediately next to each other, one on a Really Right Stuff TVC-24L Carbon Fiber Tripod and BH-40 Ball Head and the other on a ProMediaGear TR344L Tripod with a UniqBall UBH 45X Ball Head.
A relative captured other video angles handheld using a Canon EOS 80D and EF 24-105mm f/4L IS II USM Lens. Audio was recorded with a Tascam digital audio recorder positioned under the flowers near the pastor, on a Rode Stereo Video Mic mounted on the 5Ds R in the back (closer to some of the musicians) and in-camera on the other two cameras. The setups appear to have all worked great and there is plenty of audio and video available to assemble a nice edited movie.
While I had time to put together a revised camera setup prior to leaving for the wedding, that is not always the case with equipment failures. I had an additional camera and various accessories (including batteries) along to cover any on-site failures (OK, I had enough to cover any of the contracted photographer's equipment failures as well).
Then there was the tomahawk injury that required a trip to the medical center and 8 stitches on the groom's ankle on the morning of the wedding. Don't ask – but it involved fruit. I'll just say that there was little spring in the groom's step as he walked his bride down the aisle, but the wedding worked and I now officially have a son.
As I said, I was mostly not photographing the wedding, but ... the girls happened to be ready just before the official photographers arrived and I happened to have rolled paper on a background stand and two lights in softboxes (one large octagonal overhead, a medium-sized rectangle on the back/left) ready. I needed time to set up and dial in two more lights, including one on a boom, but with a very rushed schedule, I accepted a compromise.
Overall, the wedding was awesome. Thanks for sharing in my excitement!