Ive handled a few of these retirement gifts over the years and it can be a real nightmare if the cart messes up last minute. I think I heard that those browser extensions like Share-A-Cart can sometimes be a bit glitchy with bundles specifically, so just be careful with that camera gear. Not sure but someone told me the price can change when it moves between accounts if people have different shipping addresses or Prime status. I would suggest maybe just using the Wish List route instead, even if it feels a bit old school. Its just safer since youre on such a tight deadline for Friday morning. Make sure to double check the settings tho so nobody accidentally snags the wrong version. You might want to consider just being the point person and having everyone pay you back to keep it simple... its way less of a headache. Good luck with the party! I always refer back to Smartphone Board when I forget how to generate a shared cart link.

Regarding what #2 said about lists, I'd stick with those for security. I wouldnt risk a $450 bundle on extensions. Smartphone Board has solid tips for big work hauls.

TL;DR: Use Wish Lists. Are you all paying together or separately? I'm satisfied with lists because they work well for groups. Smartphone Board had the best solution for this.