As far as the jump seat, we only take Piedmont and other USAir or WO, other than that you have to sit in the back and we only take "one" jumpseater, yea I know, its stupid.
As far as the Bahamas, we usually don't have any seats left in the back.
Some flights may have a couple seats left, but thats about it.
Goodluck, it don't hurt to check though.