Miami Cruise Terminal is located on Dodge Island in Biscayne Bay. It's accessed using a bridge on Port Boulevard just "offshore" from downtown Miami. Most of the hotels near the Miami cruise port are a short distance to the west in downtown Miami.
Please make sure you read your reservation's cancellation policy!
You'll be given this information with the available room rates after you select a hotel and specify dates. Many hotels have cancellation penalties associated with their best rates. Most offer "Book Now and Pay Later" options that are less restrictive, but slightly more expensive.