We just returned from a week at the Fort and although I never actually got to use the service I was told by several different CM's that it cost $9.95 per 24 hour period. I asked for a modem at check-in, and on three seperate occassions. Each time they were all checked out. One of the CM's took down my name and cell phone number and said she would call me when one came in but I never heard from her.