CG, try the link again or just type in the address. Below Lake Granbury is tons of houses, a huge gravel pit and a power plant. The F.M. 200 bridge was recently rebuilt to remove all access to the river (the bastards!). It's a lot quieter below Glen Rose. My favorite part is from Possum Kingdom dam to Mineral Wells. You can get Rochelle's at F.M. 4 bridge to help shuttle. Water flow is an issue - it's easy in a kayak with at least 100 scfs. But it's generally doable in a flat water kayak any time because there are no notable rapids and you can cover the long flat sections easily. You'll just have to get out and drag regularly when it's low. I think it sucks to canoe the Brazos - good water flow is rare so you have to muscle through the wind and flat sections. Lots of great sandbar camping.
I check water flows from this site:
http://waterdata.usgs.gov/tx/nwis/rt
I need to get below Whitney Dam sometime.