Looks like a nice ride, SBP! Enjoy!
For those of you who like to pass through Concord, they are having their 375th birthday celebration this coming weekend (Sept 11 & 12). This may influence your decision to either avoid the CF that will certainly be going on, or draw you in to the festivities. Cyclists should be able to get in and around but I know traffic is stopped Sat am from 9-12.