I have done it a few times, most recently being at the mini blowout earlier this month. It rained on and off all day, so we had to fly between showers. It rained on me in flight twice, so I just landed and got under the tent til it quit. I have at times put the transmitter into a plastic shopping bag to protect it from a light misty rain.

 

So there is no adverse affects?? I like the bag idea however...