For those whose orders are generally large, my Dh and I have a system. We have two small tables by the door with a large empty plastic box on one. The driver then places the supermarket crate on the adjacent table and my husband fills the empty box to a manageable weight and transfers it to the kitchen table. Meanwhile I place a further empty box on the table by the door (if necessary, adding any items remaining) then I go back to the kitchen to empty the first one, then we repeat until all the crates are empty.
I know this sounds a bit complicated, and it does need two people - the first time we got in each other’s way all the time, but now (we started in March last year) we have it down to a fine art, and the drivers appreciate the speed of the process.
I have been sheltered since last March, and initially it was quite difficult to get slots but once the sheltered system got underway everything worked well. We do not go in any shops, so our supermarket order is always quite large.
We have been really lucky with our deliveries and have only had missing items from our weekly order twice, and occasional substituted items have been quite acceptable.