Personally, I'd leave all the tools and bike fluids at home. If the bike breaks from downing it, MOST track orgs have a 'one and done' policy for good reason. If it has a mechanical issue, my experience has been it's usually something that's not getting fixed in time to get back on the track (and having had mechanical issues at at least 1/3 of the trackdays I've been at since buying the SV, I'm somewhat of an expert on this). Even if you DO get it sorted, your head won't be in the right place.
Everything else seems spot-on, though I'd leave the rain gear home as well. If it's raining, I'd just go home, personally. But maybe that's just a spolied SoCal approach to it! I'd also recommend to BRING A FRIEND if possible. For one, it's always nice to have a buddy with (though most riders at trackdays are extremely friendly and welcoming), but it's also a safety thing.