First off, I love that your daughter and her friend are planning and saving for this trip together! So sweet! I think you're smart to do a one park ticket at DL with a newbie. I also agree with others that the 15/16 would be better than the 8/9. Many districts (including mine) have Thanksgiving week off, but you're lucky because Thanksgiving is very late this year, so you're not running into that. It's also better to avoid Veteran's Day weekend, though we've done a couple really great trips that weekend and had a fantastic time. You can do anything with a plan!
How interesting! I never thought about it that way, but it makes sense! Do you think Friday the 15th or Saturday the 16th would be a better day to go, do you think?
My gut feeling is that Saturday the 16th would be better, though they will both be pretty crowded. I know you mentioned the passes, so you already know that Deluxe is not blocked Saturday, but SoCal passes are. I have no idea how many people have those SoCal passes anymore, but it certainly couldn't hurt to go when they can't. The other reason I'd suggest Saturday over Friday is what we used to experience as local AP holders. We used to go on Friday evenings very regularly...us and half of southern CA, it seemed.
The crowds would continually build throughout the night as people got off work. We still had fun, but we were locals and didn't need to hit everything because it wasn't a special trip. I'd also imagine that Saturday would be easier to navigate since you're driving and can probably leave earlier on Friday than you could on Thursday, it sounds like? To me, that would also be a huge benefit. We live in northern CA now and drive about 7ish hours to DLR, so I was just thinking about what would be easier.
Hope that helps a little. Again, it will be crowded, but you're going in prepared, so I'm sure you will have a great time. I hope you post a trip report!