@patdavid - maybe the title of this forum thread could be changed to something like "Advice for event shooting and processing"?
It would be nice to hear from some people experienced at event shooting (something I've never done). But personally I'd suggest that if you are shooting raw, then set the in-camera white balance permanently to AWB or else the Daylight preset, which will allow you to shoot "only raw" or else "jpeg+raw" if you choose. (UniWB is the other option, but shooting "jpeg+raw" is pointless when using UniWB).
And then the only thing you need to worry about (besides getting past the trigger happy smart phone users to get your shot) is to also take some appropriate white balance shots for the various lighting conditions, to be used to set the white balance during raw processing.
As far as your equipment goes, having less available equipment (one camera, one 50mm prime lens) is an advantage precisely because it limits your options. You aren't fiddling with changing lenses. You aren't fiddling with setting the exactly right zoom on a zoom lens (something I intensely dislike about using zooms). So as far as framing your shots goes, the only things you have left to worry about are where you put yourself, where you aim the camera, and when you press the shutter. And that's quite enough to worry about!
I think everyone develops a preference for a given lens focal length. I have a 28mm prime and also a 50mm prime that I "inherited" from my husband's film camera. For anything other than street-shooting (and sometimes even then), every time I put the 28mm lens on my camera, about two shots later I put the 50mm lens back on the camera.
For event shooting and street shooting, many people will prefer a 28mm lens. But the "shooting" price you pay for a wider angle lens is that the 28mm lens "sees" from a different framing angle compared to what you see with your own eyes (wide angle distortion). I like the fact that when I look through the 50mm lens, what I see is pretty much what I see when I lower the camera. But this is a personal preference.
Eventually you might want to borrow or rent a 28mm lens and see if you like it better than the 50mm lens. But before trying new equipment, it's better to master your current equipment. A 50mm lens on a 1.6 format camera is already a pretty nice combination - the smaller sensor size means a greater depth of field for any given f-stop, and for fast-paced event shooting I suspect this is an advantage.
For my own style of shooting, I put my camera on full manual mode, and my lenses are "manual focus only". For street shooting, I do use my 28mm lens (the only time I use this lens) and the classic "f8 and be there" to avoid having to think about the fstop. Then only thing left to think about is the shutter speed and setting the lens point of focus, which I usually leave set to the hyperfocal sweet spot where as much of the depth of field as possible is in focus. But this style of shooting does presume conditions with plenty of light.
I suspect many event shooters today rely on various automatic options such as auto-focus and various automatic shooting modes. Personally I never did figure out a good use for automatic shooting modes (but I know there are styles of shooting that required using these modes). And with my first digital camera (a point and shoot with a zoom lens), I came to absolutely loathe the whine of the autofocus lens seeking its point of focus, which was never where I, the photographer behind the camera, actually wanted it to be.