Hi mushroomgod,

Have you tried to build help/guide lines ?

Just after selected the curve tool, you can drag 2 tangent guide/help line along the end curve, just by clicking (and stay clicking) and drag the mouse more less along the tangent direction ... the helper will show the tangant snaping info.

You can then draw the curve and use the guide line to snap the 2 last control points and keep tangency.