Stobing with the bees can be intimidating the first time out. If you can get the lights close to the corners like Scott and others have said that really improves the lighting. Having them up in the air on stands prevents spillage of light from the 7 in reflector. The 11 or 12 in reflector or sport reflector really helps. I still shoot the 1D for strobe work and your sync speed does not really matter since the strobes are stopping the action.
In a gym like this you could play around with the railing and the clamps or even the mezzanine and the clamps. Tim taught me the 1 bounce and the 2nd direct. Do not be afraid of playing around.
Most every hs gym I go into is somewhere around 400iso 250ss and F4 full power on the bees on the corners bounced at the key. Here is a 1D shot from last year where the leak was a little hot since my lights were lower on the stands.
