The belief of some here is that travel ball on the small diamond is somehow necessary for future development in the game and you will be irrevocably behind if you do not.
What I believe is that playing anywhere is important by about age 8 to 10 years of age. So long as the coach in those tender years does not screw the player up or destroy his love for the game all will turn out just fine.
Coming onto the full sized diamond the player should have proper throwing and batting technique reasonably well refined. He should understand the basics of the theory of baseball, team work, the mental side of the game (sadly lacking in most youth coaching), a good work ethic, be a self starter, and have passion for the game.
Bring me a player with the above and I can quickly help him learn the more esoteric nuances. (Note I did not say teach) If he has the innate qualities to go further and has holes here or there, these can be plugged as he moves forward.
Usually there is a year of full sized diamond play before HS tryouts and any gaps in technique or knowledge between rec and travel can easily be overcome in that year.
How long does it take a player, for example, to learn to pitch from the set after coming out of LL? 45 minutes should do it. But becoming proficient takes more time. One season is enough to level the field.
I think both travel and rec are great because they both offer the kids the opportunity to learn. There is no such thing as teaching; there is only learning. The best coaches offer players the opportunities to learn. More players advance in the game in spite of their coaches than because of them.
Would you pick a team for your son that is rec with a great coach or travel with a mediocre coach? Are your son's best interests better served playing 3 times a week and practicing 2 times a week or playing 5 times a week? Would you rather your son plays on the freshman team as a starter or sits a lot on the varsity team? Think about those questions because the way you answer defines you.