For those on the MO side, it looks like a pretty decent middle ground is Highway 67 and Watson Road. There is a biker loving bar and grill there, Mile 277
From there, I'm not sure the best route to take. We could head south/southwest and ride along the Meramec. We could head west/northwest and ride through the hills of Ballwin and Wildwood areas. Further south we have Butler Lakes and the Arnold area.
If anyone knows these areas and has any input on good routes, that would be awesome!