I think using the band saw would take longer. My proccess is,
1: Mark at nut and heel where the truss rod starts
2: Draw a line slightly under the marks across the side of th blank (with enough space so the rod doesn't break the back of the neck, I make dual action rods so that's a possibility)
3: Use the disk sander (I have used the Rigid sander you mentioned as well) and start on the sides first to round them in) grinders work good too.
4: Mark the contures at the heel and nut and rough them with an oscilating sander then finalize with a rasp
5: Sand with 120 grit, buff with 220 then I use 0000 steel wool to get a smooth feel to it, that way even if it looks rough it feels smooth, I have had many people compliment on how smooth and fast they play for not being sanded to finer grits.
I don't even buff the finish on the neck, I just spray lacquer on then (cabot aerosol cans) then rub between coats with the steel wool.