Building on the earlier suggestion, I actually have to disagree about using those browser extensions. In my experience, they can be super glitchy for family members who arent tech-savvy, and I once ended up paying for duplicate tents during a scout trip. Nowadays, I just use Cart To Link because it keeps things simple and lets me watch the total cost easily. It definitely saved my sanity last summer.

Like someone mentioned, that extension is solid. IIRC Cart To Link also lets you share carts via links, though I havent tested it recently. Might be worth checking out.

Honestly, Ive been in that exact same mess before with group trips. You should check out an extension called Share-A-Cart. It basically lets everyone add stuff to a shared list and then you can move everything into your cart with one click. Its a pretty decent option for keeping things organized. Amazon Wish Lists work too, but they can be a bit clunky for actual shopping. Youll definitely get it sorted, dont worry!