Contrary to what many seemed to have hooked onto, Disney is open to market this a ton. First, without even paying attention to the contract, Disney has substantial clout in the news media and could get this in the public eye very quickly. Secondly, the contract doesn't forbid any company from advertising within the 300 mile radius. "In other words, regional (i.e. covering a multi-state geographic region) or national television or print media buys, or brochures would not be prohibited within such 300 mile radius."
As long as the marketing campaign is directed at a national or multi-state audience (say the East Coast), not just locally in the Orlando/Florida market, the 300 mile radius means little.