Potential issues for hot upcoming track day?

RN SHARK

Still on stock rear diff (on wish list!), no diff cooler either.

I was wondering about this and that is why I added this info in my initial post. I'm driving up to LA from San Diego and thought I could do a couple things in one trip. That is, go to Fast Intentions and have Tony, the exhaust master, deal with the demon bolt and install the headers, then drive across town to sleep at hotel and enjoy a track day in the morning. I was planning on doing another UpRev tune back in San Diego after the track day. I know not ideal, but will that be detrimental?
As far as octane goes, Auto Club Speedway and CA is very strict with selling it. I know that at the track it can only go into full race set-up fuel systems. They wouldn't sell it to me. Would a one-time octane booster additive help? I'm usually against those silly additives tho.
Again, thanks guys for all your help with these questions. This online community is great!

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'09 6sp/Z1/PowerTrix/SPL/Swift/SRP/Whiteline/F.I.LTH&CBE/UpRev by Seb/CJM/Stillen/Ings+1/RJM/TrackSpec/Sparco/Motul/Wavetrac/Coolerworx/Verus/CraftSquare
'14 SRT Grand Cherokee; '08 TL Type-S