I've never understood the logic behind "wetting a field to slow the other team down". If you wet the field and it slows the other team, wouldn't it also slow your own players down thus negating the slowing down the other team advantage?
And yeah, bring in the field turf. If astro turf was the only other option, then I'd say keep working with the grass. But there's nothing wrong with field turf (as long as the turf ain't blue...Boise State).