I would stay away from character meals...they don't scream "bachelorette party" to me. I would especially steer clear of the castle (CRT)...because they don't serve booze.
Instead, maybe something like dinner at Flying Fish (on the Boardwalk) then drinks at Jellyrolls (which is a super good time) followed by dancing at the Dance Hall.
Or if that's not really your thing maybe dinner at 'Ohana followed by drinks at the bar (they serve drinks in full pineapples).
Raglan Road would be another fun option in DTD, along with House of Blues.