I think everyones HPDE/TT experience can be different. I like to ask forgiveness before permission. Here are some random track day images I snagged off my facebook. None of these cars are "racecars" caged. All pictures were screened for illegal activity, some pictures were removed.
160mph down the straight at TWS, we were allowed to run the high speed banking leading to the straight for one session.
Camping at the track
Miata Challange track day at HHR, all people pictured are MT members in their driving suits as worn that day.
Spoolin2bars drag racing a Viper
Miata purchased from a used car lot 5 weeks before, threw 2k at it and won MC street class and beat all modified drivers too. Earlier in the day I had Khakis, button up shirt, and leather boat shoes on.
Friend sleeping in my trunk, so I drove around like that and ran track errands.
Corpus track crew 2009?
Drunken party at a race shop in MSRH
My Dad and sister battling on grassy PCA track
Redline event at VIR
Standing water in a turbo street Miata with 205 tires yikes!
Got bored and drifted the grassy PCA track for a whole session, no ***** given
Hustler cooking dinner with his front license plate
Texas Miata Challange group photo with shotgun
Working on buddies car
Did I mention working on buddies cars?
This is what HPDE/trackdays has been like for me, YMMV