With those scores your son should be putting his email subject line as, “1500 SAT - RHP - 6’2””. Those top academic schools will at least kick the tires. UChicago, MIT, JHU, and Caltech (technically test blind), will all look for a 1500+.
I personally preferred the early SB. It allows the player to get on a coach’s radar early. A bunch of schools my son wasn’t even considering reached out and some even came to see him at the WWBA a month later. My son only did one prospect camp. Instead, he did a second SB in August for coaches to get one last look at him. From there, he considered his offers and scheduled visits.
PTW is very expensive. You can get the same result without them, but it is a nice option to outsource if you can swing the cost. They will personally introduce you to coaches and you will get more meaningful attention from them. PTW will also be able to tell you right away whether a coach has serious interest. They know how many positions a coach is filling, the profile of player the coach is looking for, is your son a primary option or a backup plan, etc. If your son is a fringe player as far as ability (not 88-90+), PTW will market him and find a good match.