I'd feel great about doing them a couple of days in advance. Good heavy, sugary icing helps them keep longer. Keep covered at room temp. You can also freeze.
This all-about- cupcakes post is part of my Cooking 101 Series. . If you need to make cupcakes particularly far in advance, or if you love baking.
Q: I'm having a graduation party and would like to serve cupcakes for How Far in Advance Can I Make Frosted Cupcakes and Cakes?.