So they've been here a full 48 hours now! Time for a review.
McMurray has been wonderful, right from the start. The only problem I ever had with them was their website saying my order had shipped when it actually didn't until two days later. That caused a bit of anxiety, but other than that, McMurray has been fantastic for me and I will absolutely order from them again!
My birds shipped on the 7th around 3pm, at which point I noticed a tracking number added to my order on McMurray's website. I was not otherwise notified, and I only noticed because I happened to check and see it.
My birds arrived on the tenth; I got the call from the post office at 7am to come and pick up my 'baby chicks'!
When I got to the PO I only needed to tell them that I was called to pick up a package, he scanned it and handed it over, and I went on my way. I wasn't asked for ID or anything else as has been some others experience.
I got the ducklings home and opened the box -- without my requesting it McMurray included what looked like a heat pack...? and a cup of gro-gel in a small cup taped to the side of their sturdy shipping boxes. The box had my number on it with clear instructions that I be called immediately upon its arrival. There was also a packet with a receipt of My order, care instructions, information on how to identify the breeds of day old waterfowl, the leg band colors of sexed birds for each breed, and guidelines on protecting yourself from dangerous germs when dealing with poultry. My only complaint is the the two labels + packet covered over half of the ventilation holes on the lid of the box, but my ducklings arrived extremely healthy and in wonderful condition!
Because my birds were sexed they did have the aforementioned leg bands; I just snipped then off with a pair of scissors while putting the ducklings in their brooder.
And that's all I have to say pretty much! Perhaps too detailed, but I really wish I'd have found something like this to help me make my decision before ordering. I like to be as informed as possible.
The ducklings are doing amazing -- my only regret is not saving money by purchasing more in my initial order.

I'm looking forward to enjoying fresh duck eggs after so many years!