Maybe we were just lucky, but we were there April 27 - May 7 and none of us ever saw or felt a bug of any kind. We were at POR, went swimming in the evening, and spent evenings at MK, Epcot, AK, Disney-MGM, and AKL. My wife is normally a mosquito magnet, so we were pleasantly surprised. But it sounds like some people do have been bitten recently, so you might as well just pick some up.