It sounds like you have everything that you really NEED for when he's first here.
It's August, so clothes arent a huge issue, but you're covered with that anyway!
you have boobs, so he has food. you have some dipes, so that's good. covers will be good, but you could go coverless for the first day or two if totally necessary, and you also have those disposables. (we're using disposables the first week or two) maybe the diaper service also has covers that you can buy, and they could bring them with the first delivery?
You probably wont need baby "products" like shampoo, etc until later, since in the beginning, just water is recommended.
the pump would be nice, but i think you also have time for that too... so maybe DH could wait till you're up and around, and you can go together...
of course, this is all based on hearsay and internet research knowledge, since I'm a first-timer too! But, you definitely have the basics covered.
place to sleep, food, clothing, shelter, and something to catch the pee and poo.
everything else will fall into place, and don't forget how generous people are when they come to visit a new baby!