The Cabot Trail is on my bucket list, zero question.
That said, as much as I make fun of people trailering their motorcycles around....for a good majority of that trip, at least to Rivière-du-Loup, a trailer would be something I'd actually consider. I've driven that stretch of road more times than I care to remember across many, many years of my early years in the trucking industry and yeah, it isn't the most interesting. And reality is with my wife on her own bike she's pretty much done at around 500-600km in a day, so we're talking 3-4 days of just riding each on the to and from. In a cage I'd knock that off in 1.5 days flat.