I couldn't believe a “women's only” race would mean anything other than no male pacers allowed. After all, it appears that's solely what they are after.
As for the debate about pacing, I'd challenge anyone who has raced a 5K all-out with head to head competition and not with a sit and kick strategy to attempt to match that time all alone on a local track. It just isn't going to happen. The longer the distance, the more difficult to hold the pace without someone running with you so the 5K test is only the tip of the iceberg when it comes to pacing over long distances.
I've done some 5K time trials over the years. My best track 5K in a race: 15:43. My best road 5K in a race: 15:57-15:58. My best solo 5K time trial on a track: high-16s.