What kind of sander? I suppose if you only have a 1x30, you MIGHT get a little extra mileage out of a stone wheel, but I don't see any advantage over using larger sanding belts right after the bandsaw.
Anytime I've tried to profile much of anything on a stone wheel bench grinder, it seems like the grinder mostly got in its own way, especially as the OD of the wheel wears down.