I feel like I opened a can of D3 worms, but this is kind of fun...I have seen a lot of baseball myself and do not think a showcase team assembled for the summer would beat a legitimate D3 (or other level) collegiate team, one that practices daily and is 2-6 years older, regularly. I don't care how good you think the Canes or Banditos are. For the most part they have not seen the level of pitching, even gasp at D3.
Also need to make it clear not all of the D3 boys are paying big bucks to "feed the dream" as many have (a) merit aid and (b) substantial financial aid for those who qualify. Please do not assume or make it seem like all private D3 baseball players are there because parents have big checkbooks. And the D1 Ivies do not offer scholarship money either (or merit money even) but there are many here on this forum who would agree that if you can get one of those coveted spots, take it.