Living in an area that has seen 3 major (500 and 1000 year) floods in the past 40 years (Big Thompson '76, Lawn Lake, and Big Thompson 2013) that wiped out some campgrounds, significantly damaged others, and killed people, it becomes a detriment to all of us to attempt to get into an area that is experiencing flooding or could be prone to flooding. Flooding is something to take very seriously; while it may seem minor at one point, it can horrifically turn major and become life threatening. Knowingly entering a flooding area places one's life in jeopardy and should not be done under ANY circumstances.
While it is a moot point now, several years later, in your scenario, as soon as they said there was flooding I would have asked for an immediate refund and called my credit card company to dispute the charges.