How many optometry schools should I apply to? (and what are my chances)

I'm just getting ready to submit my application but I'm second guessing the number of programs I'm applying to. The two that I am for sure applying to are PUCO and ICO. I was considering applying to SCCO and Midwestern (Glendale), but was unsure if it was really necessary. I guess I'm just wondering if applying to only two schools is a bad idea or not?

These are my stats if that helps any:

OAT Scores: 340 TS/330 AA (No scores below 320)
GPA: 3.846
I have a little over 30 hours of shadowing...

How many optometry schools should I apply to? (and what are my chances)