Sounds like you are pretty organised already.
The Karen Pryor clicker book is good to start off with. Pamela Dennison is worth getting too though!
A few suggestions though:
Small crate for travelling in the car perhaps? - When Coco was small enough I used to take her in a wire cat basket. Whenever she went in the car she just went to sleep (and still does!)
Earplugs - if you are going to be cruel like me and insist on pup sleeping downstairs
Lots of handwash and Dettol floorwipes for cleaning up puppy messes
Make sure some of the toys are cuddlies - Coco still loves her cuddly toys best
I get them from charity shops usually for £1 or less
Re: bowls - I would reccommend getting a spaniel bowl if you are going to feed any wet food (or water) so you don't have to constantly be washing and drying ears
Cardboard boxes and toilet roll tubes are very useful for sleeping/playing, so start saving them now
And yes, get plenty of sleep now!
And remember, we will need pics as soon as you get your pup home