Tips for moving in as someone from the east coast?

Hi! I am an incoming student at Cal Poly and I'm from Pennsylvania so the move in process is kinda stressing me out. As of right now I just plan on packing up clothes in a few suitcases and flying down a few days before the move in date so I have time to also buy basic stuff like soap and bedding while in SLO. I'm worried though about fitting said clothes and other items I plan on bringing as well as what to do with any items I can't take home over the summer and stuff. Please share your experience or give me any tips or advice on moving in to Cal Poly as someone who lives very far!