You really don't need to even do that. You can put a charger at every parking lot in front of the convenience store (Already happening in a few locations around me).
But also, most charging (at least early on) will be happening at home. There really is no need to convert every gas station into a charging station. We just need major throughways covered. The one missing piece is L2 chargers, We need more of those installed in more locations. For example, employers could easily put them in office parking lots. With 8 hours to charge, you could even do L1 chargers.