Sudbury River starts from Cedar Swamp Pond (Westborough) and ends at Egg Rock (Concord). Total length is about 32 miles.
I have made multiple trips in early summer of 2011 and covered about 22 miles of river from Winter Street (Framingham) to Egg Rock using my WildSystem Pamlico 120. I will try to cover the remaining upstream portion of the river when water lever is higher in the fall. I can't wait to share some experience with all of you. I hope my journey can provide some helpful suggestion when you plan your trip.
Good access point for kayak:
From upstream to downstream, using Latitude and Longitude
Key characteristic of each part of river
I use Everytrail apps to keep trip log along with pictures taken during the trip. You can find more information if you search sudbury river in Everytrail.com