Departing from Arizona

I leave Arizona for JET on Friday, July 24, at 9:05am.  At first they wanted me to wait 4 hours until I could do anything at the hotel once I arrived in LA, but they think I might be able to check in early at the hotel.  I doubt that I can, but at least I will be able to go somewhere and leave my luggage there.  It would be really stupid to have to lug all my bags around.