After a couple big track events where a tire/wheel change was not possible (I didn't have a way to get my extra wheels to the track), I decided to explore my options for self sufficiency. I saw at least one pcasdr member hauling his wheels with a custom trailer on the way back from the track.
Not being a proponent of half measures, I decided to do the best research possible into a solution I could find for my car (986.2).
I came up with two.
https://www.leroyengineering.com/paddock.php
https://www.sporttows.com/
It isn't going to be cheap, but I think it might be my best solution.