Thanks guys for all the tips. I put most of them to good use.
I had a total of 180 minutes of drive time over the weekend, across 8 sessions (all 20 minutes, save the last that was 40 minutes). Saturday started with a wet track that dried out over the course of the day, and Sunday was damp and cold to start, and then it poured the rest of the day.
I ran the whole time with the yaw sensor disabled. I think that was the right choice, even though I spun out 3 times. I started learning to feel and correct the car slipping in the wet.
I did get to start pushing it pretty hard in the dry on Saturday. I could definitely feel I was hitting the limits of the A/S3+ in the carousel (5/6) and the turn onto the front straight (14), and they were squealing like lil' piggies. The Carbotechs were amazing and the oil cooler kept the car below 205 the entire time.
They pushed me up to HPDE 2 for the final session, so I guess I was doing something right!
Now...to maintain patience for the next one
Thanks again for all your pointers!