Just to add to this, I've seen first hand these grocery deliveries handled by the bellmen. When they get a regular luggage run they simply put suitcases on a cart and off they go. These groceries can be very tricky and time consuming for them to stack on those carts. They usually go above and beyond to be careful how they stack things and ensure nothing gets damaged and locate all the stuff in the refrigerator or freezer. The extra time they spend on that takes away from other runs they could be doing. So yeah definitely think about tipping them appropriately.