We used to scrimmage ourselves at 10U. I would pitch HC would catch and the kids played Infield and Of if we had if not a dad or mom did. We got through a lot of situation stuff quickly. Truthfully at 10U(Rec) I just hoped the kids did something when the ball was hit. We didn't work too much on getting the lead runner as usually they would have stolen so we often lost the force anyway. What they did get was a lot of reps making real plays against real kids not just put on baserunners. We would sometimes start with a runner 3rd to simulate, but at that level we are just hoping to make plays. We were easily the best defensive team in the league that year.