Hi Beth. Welcome.
Sure...Sunday the 17th sounds like it's shaping up as a plan.
Does an out-and-back from Garrett Park like I routed sound okay? Simple, and one road primarily, with moderate traffic (occasionally none where the road is blocked to cars).
Should we meet in the District? Or - we could meet in the middle behind the Bicycle Place on Grubb Road in Silver Spring, which has easy access to RCPark.
Tomorrow, DH and I will be at the C&0 on the mtb's, leaving from Riley's Lock. Not sure of the time - late morning likely - and DH wants to head into town from there, not out. So, look for us if you're on the trail and say Hi! We'll be on a black (me) and an orange (him) dualies.
p.s. I've been playing with routeslip.com to challenge mdhillslug's dominance on the site ( !) - just kiddin' - and if you are up for a hill challenge, mapped DH and my favorite summer route through Howard County - a route we call the "Triathalon Loop" - don't know where the name comes from but I think some triathalon uses much of it for their race. I mapped it leaving from the Cloverly Safeway at New Hampshire Ave (route 650) and Briggs Chaney Rd. It's nice and (thus far) rural.
http://www.routeslip.com/map.php?map=15679