I'll need to change the oil before I go...
There's a few wish list items, but nothing to keep the car from making the trip if they don't happen.
With track events, I have a 2 week rule. Nothing major gets done within 2 weeks of the event. That way I have time to sort out any issues the changes caused. 9 times out of 10 there's always something that comes up as a result of changes. Especially, when you're dealing with aftermarket products.
The old guy has spoken.