There isn't enough incentive for me to make the trip. They used to do the show in combination with a track day at Thunderhill, but that stopped quite some time ago. They tried to do autocross a few times, but it has been at least 6 years since they last time. With Mark passing, there isn't even a decent party the day before.
Doubt it. I haven't been there since 2017 and my car is not it show shape. I am fairly certain that for 2016 and 2017 I was the only one from NWC to make the drive down.
Temp sensor is easy. You can do it at the same time you are doing the PCV system. It may also be the reason you are running rich.
Pulling the intake manifold off is the hardest part of the PCV system replacement, but not really that big of a deal.
Not potential, you need to replace the core ASAP before it lets go completely. The longer you wait, the worse it will get.
Luckily, it isn't that difficult to replace. I have done mine twice and there are videos out there on how to do it if you want to tackle it yourself. I'm sure Robert DIY has a video on it.
Is the boot on the axle torn? If so, that could be the source, although it doesn't look like grease. You will have to see how far up the oil is leaking on the back of the engine to determine the source.
It looks like the bump stop fell off. It is normally attached inside the spring at the top. It still works as it is captive within the spring.
They are relatively cheap to replace, so do it. If the toe has gone neutral, the car will wander more than if there is the normal slight toe in.
Toe alignment issues will case excessive tire wear. I replaced mine in December because of toe issue, and the rear bushing on both were worn out.
I am on my 3rd set since owning the car, but I do have a lot of miles on it.