well for competing they require you to have everything but for test n tune it sounds like all you need is a ballistic jacket,helmet, gloves, and boots over you're ankles.
take a look at hooken.... in the top pic.. he is at the CF raceway here in cedar falls. He just has his JR ballistics jacket and jeans. So yeah I think it would be fine.
This all was told to me by spaz and hooken. I think they are lenient in order to get the # of bikes coming to the strip. I wouldn't worry about it too much. Just bring as much gear as you own and tell them you're from SD and they should let you run that night for sure.