I'm not being a smart ass.
Option 1: Go to a local station to the track after the 2nd track session.
Option 2: I take two 5-gallon Eagle Safety cans and a long funnel. It can make a mess. I bag the full cans in heavy duty trash bags to keep my car from smelling like gas.
This $5 Walmart funnel will fit the capless fuel tank without the "emergency" part from GM.
https://www.walmart.com/ip/FloTool-S...unnel/23591340
Eagle Safety Cans
https://www.amazon.com/Eagle-UI-50-F...=eagle+gas+can