shppirate, I think you may know the answer to this better than anyone else. Do college coaches and scouts attend your HS games? If not, then you may have to attend showcases to put yourself in front of them. Who are the scouts and coaches that attend? Are they from programs you'd be happy to attend and are a fit for? If not, then you need to find other avenues... showcases or depend more on your summer team.
I think HS programs vary widely depending on area and the talent that the program has. Some get much exposure and some none. Showcases vary just as much with some providing exposure to schools all over the country and some being more local.
Most important thing as a sophomore is to keep your grades going up and work your tail off!