I am going to move you over to Theme Park Strategies-I'm sure you will get many more answers to your question. Welcome to the DIS, how about taking Notes and posting a Trip Report when you get back.
I've never used the parking pass, we usually take a car service or Magical Express to the hotel. However, don't make the mistake I did with the photopass. I wasn't aware that I had to mention to the CM at the registration desk that I had a "package deal" for the photopass through AAA. You are suppose to tell the front desk cast member at the time you are checking into the hotel, show them your paperwork and they give you a voucher for your free photos. We had our photos taken and then inquired as to how to order our free photos and were told we should have gotten the voucher at check in. Out of luck. Apparently, AAA use to give you a card with your packet but have changed their procedures. Double check before you go, but that was my experience. Have a great time!!!
I ordered our park admission through AAA and got the parking pass at the bottom of our form with admission cards attached. I didn't get the photopass, but I guess you get that at check in. The parking pass is just the bottom third of the paper, it isn't a separate item - although since you booked a room inclusive package - your mail may look different.