There's a couple of ways you could do this, depending on whether you want correct exposure across all tonal ranges, or if you can live with some overexposure in the lightest areas.
As you guessed, if you want to freeze the movement of the flying bees then you're going to have to use a fast shutter speed - there's no way around that. If, however, you want to ensure that the shadow areas are exposed correctly switch your camera to manual mode (
M on the dial) and then set the exposure to between +1 and +2 stops for your chosen shutter speed. The highlights will be close to blown-out, but the shadows will be correctly exposed and you will have captured the movement of the flying bees.
The other option is to use Shutter-speed Priority (
Tv on the dial). Select your shutter speed and accept the camera's auto-exposure setting - since you're shooting in RAW, this isn't so much of a problem since more image data will be recorded than you can immediately see. Once you get the RAW image onto the computer you can do a number of things:
All of these options will help to bring out detail from the shadows without blowing-out the highlights.
Hope that's helped a bit.