I know the best answer is to always "know how to use" flash in general...
That being said, I currently shoot with a 430ex. I purchased a diffuser from my local camera shot & I have figured out how to use it, the only problem is that it works correctly for only about 25% of the situations where flash is needed.
I have an event coming up where I will need flash since it will be indoors with little to no light at all (concert).
I am about to buy a flip bracket since I will need to shoot vertically with flash.
My question is this, will getting the flip bracket and using the 430ex alone (no diffuser) be good enough for wide angle (17mm) to somewhat tele (100-200mm), in a dark environment that will be roughly the size of a small theater/concert area?
Should I invest in something like a Gary Fong? I am bringing some fast glass with me (1.8 & 2.8 ) so I am hoping that the faster glass & non-diffused flash will be appropriate.
Typically I shoot sports & small events, this is a bit outside of my normal (helping a friend out), and I just want to make sure I am prepared enough. I am open to getting different gear if needed.
Also, as a side question, what flash brackets work well for a gripped 7d/5d body?
I appreciate any/all help in advance.
Thanks.

