Success! I didn't crash and die or break anything.
Highlights. My experience occasionally being a jackass on the street (and honestly racing sims) definitely helped in terms of knowing when to brake going into the curves. I could really feel the low center of gravity in this car and it does feel like it is the tires that really held me back (aside from not being a good driver yet).
I was in the novice class, several mustangs, a Ferrari, some big boat of a Mercedes, a fiat smart car deal, a golf, a couple BMWs and odds and ends. I went into work early and topped off to 90% at the supercharger near the track and got to 100% over lunch on a chargepoint charger. The course is 2.5 miles and I think I wound up hitting 7 or 8 laps each round. Round 2 I lost about 60 miles of range. Getting to the track with a full charge I would have had plenty of juice to run all 3 groups and the pace laps and still be able to get to the supercharger 10 miles away. There aren't any charging stations at the Heartland Motorsports Track, but I'm sure I can find a 220 somewhere to top off instead of driving to the supercharger.
There wasn't anything on the track that embarrassed me on the straights....until my battery got hot towards the last lap or so, then a few of the faster cars such as an M2 (which may have been a little modded) were able to pull away. In the curves I think I was in the middle of the pack in terms of speed (some combo of the car and me).
The level of attention I received was interesting. The 3 doesn't really stand out in the parking lot, but when people got closer I had quite a few asking me a ton of questions and complimenting the car. A few tesla fans (but non-owners) were excited to see one there. Even had one guy say he had been iffy on Teslas but seeing mine in person changed his mind. Everyone loves the interior of course. Insurance was a smart move, I was able to drive and not stress too much.
I didn't notice any brake fade, maybe because I wasn't on the throttle enough or maybe regen really helps that. I'm really curious to see if track mode helps out with battery cooling at all. That seems to be a big handicap. although it was an unseasonably hot day.
@Nocturnal So how did your track day go?
Went great. See above.