I'm a Canon girl!
For all of my fellow techies out there, I have Canon R6 Mark II & 5D Mark IV bodies for my mains/backups. My main lenses are the 24-70 2.8L II and the 70-200 28L III, but I have others as well.
Short answer without getting too technical: YES!
I have extra professional grade camera bodies, lenses, and flashes in the event that something happens to my main gear.
All of my cameras hold 2 memory cards at the same time that save simultaneously, so there is always a backup of your images while I'm shooting.
Absolutely. I can provide a certificate of insurance to your venue if needed. Just let me know!