I send my wish list to my SA before access day and she pulls what they have in stock for me to look at on Wednesday (I was also demoted to Ambassador this year). Before the store opens on access day (9:00pm Pacific time on Tuesday) , I order on-line what is not available in-store with expediated shipping to
Nordstrom Local. I'm not sure there is a private event for Ambassador tier - only Icon tier on Tuesday but I will ask!
Also, alterations are not free for Ambassadors like they are for icons. You have to pay for them and then you get
Nordstrom notes as reimbursement.