How can things get delivered there

There's this funny little thing called the "postal system". You should try it sometime.

When delivering through FedEx and other services use the local address provided by the campus. Be sure to place the correct living unit of the dorm and name of whom you're sending it to. (Most reliable) The post office has a P.O. box for the campus so be sure to find that first. (Less reliable)

Yes thru ups,FedEx, and the US Post Office! But its subject to be searched cause its a government funded school grounds!