10
I'm actually very impressed that coaches at that age group would pick up on the pull side/wall side. Most coaches ignore the o-line on both sides of the ball.
We had a strong side (wallers) and quick side (pullers/cutoff). We had a Power back (actually 2 of them who subbed in and out) who ran tosses and sweeps and we had a counter back who ran counters and reverses. Teams would pick up on our power backs and bully up opposite of them.
Default was Toss right. If we wanted to run left, we'd call "Flip Toss". A Chinese fire drill would ensue. If we wanted to counter, we'd have to huddle and call it because we "flopped" for counters. This mean that the line changed, but the backs didn't move. The defenses that did the best against us never tried to shift. The ones who shifted . . . we drilled quick snapping while the defense was out of position.
We never worried about anyone picking up on our flipping. I was in charge of scout defense during Power Hour. I knew our linemen as well as anyone, plus I was standing about where a back judge would stand. I was responsible for bullying up the play side, often running 14 guys on defense. I struggled to move kids to the strong side at times and as I said, I knew every single one of our linemen.
We also took the approach that if a coach bothered to teach his defense who my strong side and pullers were, then took the time to teach them to adjust to it, then we were stealing practice time from him. We were getting better at what we wanted to do while they were inventing new ways to slow down one team.