re: 12 yo Tournament Baseball practice

At around 10, my son practiced at least 3 days/week at 2-3 hours/day in rec ball. He never played travel ball, but a lot of his buddies did as they got older. They practiced roughly the same. He's now a freshman in high school and they practice more more than MLB. Prior to season, 4 days/3-4 hours organized through the school and 2 days "voluntary" bp at the cages. During the season, whatever days they weren't playing so he was either playing or practicing 6 days a week. Now, he's in summer ball with the school. It's a little more laid back.
My two cents on travel ball v. rec ball. As I said, my son played only rec and started jv this year, but was called up to varsity 3 weeks into the season. There is not a noticeable difference between him and other freshman/sophomore who did play travel ball, AND I saved thousands and countless road trips by not going travel ball.

You're right and wrong.

They all need reps, reps is what makes them good.

But innings makes them better.

You can practice all week long but if you aren't playing games, watching live pitching, live balls coming off the bat, real situations, you're going to get stagnant.

Kids 10 and up need innings. Practices alone will burn them out.