You can do a one day school on the Friday before any SOAR race weekend. Or you can do Racer 5 and get your race licence. Or you can show proof of any other accreditted school that you have completed, and that SOAR recognizes as sufficient, then you can buy your licence without even riding for SOAR at all..just show up race day and ride.
However, I suggest a race school, Racer5 would likely be easiest as you can roll the scool, the licence, and racing all into one weekend. Racing isn't all just riding. There are track etiquette lessons etc that will be very helpful, and there's nothing wrong with input from an expert racer...who knows, a teacher at a school might find flaws in your riding and save you more than a few seconds a lap. Unlike a trackday, in racing, a second a lap can mean the difference between winning and finishing back of the pack.
If you are worried about a bring 90 minute drive to a track from KW, give up already. To race, be prepared to drive alot more than that. I have seen racers drive to the track from the GTA on Friday for practise day, drive back home after arriving becasue they forgot their helmet and back protector, then drive back home again after the qualifiers the next day for spares cuz the fell down during qualifying, just so they can fix their bike for Sunday racing. You live very close to Grand Bend, all things considered...I guess it all depends on committment. Our buddies just got back from Alabama to go racing, and they only live an hr from the GTA.