If Hinata can close the distance she would wreck Temari, but I'm not entirely sure she can. The field is flat wit no real cover, and Hinata really hasn't shown much besides taijutsu. (gentle fist or whatever) In her brief exchange with Pain she just kept running straight at him with no real skill on how to close the distance properly. In the Anime Konohamaru actually had things that helped him get close to Temari like the clones, Shadow Shuriken, Fire Release: Ash Pile Burning, and his surroundings. I know it was the anime but still.. I think Temari would win, I could be wrong though.