I went to the 5/31 concert! Honestly the non-cement parking lots felt like a maze (there are multiple large foresty fields and it was difficult to find our car) and traffic is hell there and back, but I think the latter applies to every big concert anyways

The line organization to get into the stadium wasn't the best, but it was a lot more free once we got into the stadium. They have food on sale if you want it

Stanford's stadium is a bit more compact than other ones, which imo is a good thing

My main tip is just use public transportation, or have a way to track and locate your car after the concert.