Young kids (elementary) should definitely be playing 2,3, even 4 sports if they want to. Play for the season and then move on to another if they want to try another, or extend one if they are only interested in 2 sports maybe just to keep them active. There are some sports that are better than others to pair up with wrestling. Football is usually not going to have much going on when it is not in season. It is a great mental break and physically different so you don't get injured from repetition when you turn off wrestling and turn on football for a few months. Travel baseball is a nightmare in my opinion. They start practicing in December or January and play through August. There are high costs so the parents feel they must do it all. Plus the kid's whole summer is spent competing instead of playing and being a kid.
I think you can still strike a balance if the kid ends up in football and wrestling. Wrestle and compete during the season. Take some time off after the season. Find a club or an RTC to go to maybe 2 or 3 days a week in the summer. Maybe wrestle one or two summer touranments. Play little league or Cal Ripken even for fun if you want, just not full blown travel ball. When football starts, be 100% football and take a mental break. I think a kid who does that has a chance to compete for a state championship if they have some talent, work hard, have a good coach and partners. Anyone who wants a state championship are going to need those things. Put yourself in a position to have a good chance and then show up, do your best, and see what happens.
From what I have seen, kids who start wrestling at 6 or 7 years old do have an advantage heading into middle school. But 3 years in middle school with a good coach and maybe some summer wrestling for a kid with physical talents makes it very possible to make up that gap on the more experienced kids. I really don't care anymore if a kid has any experience before middle school, I just see it as a challenge to prepare them for high school and I enjoy seeing the huge improvements. Plus they don't have bad habits to break or believe they can headlock or bulldog to win every match - its hard to convince kids those things aren't going to work when they win with it for years.
I think kids expect too much as a freshman and make bad choices for a career based on what they do when they are at a physical disadvantage against more mature kids. I am trying to stress that their success will most like come as a junior or senior and you have to pay your dues to get there - take the lumps and it will pay off.