GreaterB try this for the way to work:
http://www.bikely.com/maps/bike-path/95394
For an optional zigzag; take Lake to Falls and then Lakeside Dr/Woodbrook to Charles St. Note that this route has a bit of natural surface bike path and its a little hard to find the first time.
(Sort of thinking out loud on this route.)
On the way home I would stay on Smith and on the other side of Kelly take Sulgrave over to Greenspring. And take the roads behind (north of) the Zoo.
So about the NCR trail: I will be riding from my house to the trail. I'll leave around 8 AM to get to the Paper Mill Parking lot before 10 AM. So far they are predicting 30% chance of rain and a high of 51. In my book 30% chance of rain means it won't rain on me if I am out riding my bike (as opposed to it will rain if you stay home and wash the car.

) And 51 degrees is too good to pass up.
Let me know if there is any definites for the ride (before 8 AM on Sun) otherwise I'll probably do a BBC ride.