Remember that you are required to notify a control tower when operating within 5 miles of a controlled airport. We recently had one that the owner lost control of drift across the airport property here which closed the airport for about an hour. Prosecutions were contemplated and then dropped by the airport authority.
That's what I heard too. As long as you're above 350', you're good. The Phantom 3 by default limits you to a 400' ceiling, but you can change that setting to go way higher. As with everything else, make sure you know what you're doing.