Omg you guys are gonna have the best time in Orlando!! I literally do this every time we travel because group grocery runs are total chaos lol. Sadly Walmart is super behind on this and doesnt have a direct email cart button yet. Those extensions are definitely hit or miss so I totally get the sketchy vibes... basically skip those!! Here is the absolute best way to do it:

• Add all your stuff to a List instead of the cart. There is a specific share icon on the list page that lets you send the whole thing via link!
• Just make a Registry if the list share is acting buggy. It works exactly the same and lets people add stuff too. Its honestly such a game changer for trip planning and makes everything way less stressful. Have an amazing Saturday!!