Help... Photographing a Large Room

I have a friend of mine that just opened up a gym, its HUGE!!!! About 20000sf total so there is a lot of area to cover. I want to take a few shots with my UWA that covers a large area of the gym but I don't want the lighting to be too sparse. Any tips on photographing a large area like this without huge amounts of lighting equipment? I have only one 430exII... that's it. The good news is that I'll be able to get in prior to it opening so I won't be working around a bunch of people working out. Thanks everyone!

I think the important thing is to have evenly distributed lighting, even if it's not strong light. A tripod will allow shutter speeds to handle weak light, as long as it is consistent throughout the area. Make sure to point the camera on the level, since any tilt will exaggerate convergence or divergence. Even with UWA, it will likely be necessary to stitch multiple images, so get enough overlap and keep it level. Did I mention, keep it level?

Thanks for the info, I have a feeling that i'm over thinking this whole thing but I want them to come out good so I'm trying to account for every angle. Thanks again!