You're right the Spurwink River is very good spot to fish, especially early in the year when the rivers are warmer than the open ocean. Last year I put my canoe in at the Route 77 access point and fished almost all the way down to the mouth. I use a electric trolling motor. Caught a lot of small schoolies, but it was a blast. Used small sassy shads with jig heads on light spinning gear. You need to watch the tide and get back up to the take out before the water gets skinny. I fished the mouth of the Spurwink where Higgins Beach converges with it all season long. Great spot.