Oh duh. My bad. Lazy reading + pic duped me into thinking trip was whole or in part off-road. Long freaking after work ride though, guess you're enamoured with your new bike, eh?
I remember in the '80's some guys from the shop hired a boat to take them to the head of Indian Arm and then rode to Squamish. On bicycles.
Easy to solve…take the Harrison east instead of the canyon.
And grab a left at squish, spin along past brittania, take the left at the fc golf course, climb to the top, over the chain link, rip the cap valley to the skyride, over the chain link again and ride back across the top of NV, through to twin bridges and across the lower trails to home. Fun ride, just don't end up riding out of the watershed in the gvwd truck