I guess I haven't been keeping up with fashion like I should but I would think that a SmartCarry teamed with a "sweater set" (I think that's right) would be the way to go. The top is usually kinda sorta bulky around the waist and the two piece design ought to allow for fairly easy/quick access. The skirt is usually stretchy so it ought to work well with the SmartCarry and be relatively comfortable at the same time.
Again, I don't know if these "sweater sets" are still fashionable and if I'm using the right terminology for the outfit or not.
The draw wouldn't be as nearly as entertaining but definitely much quicker than a thigh rig.