I do Barrie -> Bracebridge area -> Barrie quite easily in the summer, charging to 90% at Barrie. I typically arrive back at Barrie with around 20% SOC. Dwight would add around 120 extra km round trip beyond what I travel, but I think would be do-able if you even just plug in at 120 volts while you are there, and do a full 100% charge at Barrie. PlugShare shows a couple of charging spots in the Huntsville area if you are in a pinch.
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They have two 80 amp HPWCs there and people speak quite highly of the location. I was curious, however, as to why Tesla removed the site from their list of Destination Chargers. It was there for a while, then removed. Still on PlugShare.