Thanks, Dwight.
Unfortunately for me, the ability to get as close to the action as I do is also an indicator that I'm shooting small-time events for less than stellar pay days. This particular event for example, I not only didn't get paid, I lost money on travel expenses. I stupidly accepted "sponsor" status, which was little more than having a large, interpolated version of my logo afixed to a large banner included with other sponsors, flown above a beer tub. 
ph0ngtran wrote in post #5531586
What kind of lens were you using?
A used prime.