I wrap each cupcake in plastic wrap and then put them in a freezer bag. I can usually get 9-11 in a bag. Then I just pop them in the freezer until I need them. Thawing takes no time at all. By the time I get the last ones unwrapped, the first ones are ready to go.
I put all the cupcakes on a big baking sheet and cover the whole thing in serveral layers of plastic wrap. I've only frozen for a couple of days. Then take them out and let them defrost half an hour or so with wrap still intact, then unwrap and decorate.
I've also frozen cupcakes quite a few times and it's worked out fine. Just make sure you either put them into an airtight container or ziplock bag, or use lots of saran wrap! They will be fine 
I usually put them in just an airtight container after they have completely cooled. If i have a container that has room for more than one layer than I put wax paper between the layers. I think that it peels off nicer. I would say a month or two. Not as long as a regular cake though.
Plastic wrap each one and put in zip -lock bag, I have left them for at least 3 weeks.
I find that my cupcakes seem to stay moist if I freeze them! Some of my recipes get dry on day 2, but if I freeze them they are delicious much longer! I just put them in a ziploc bag and freeze. However, the tops do get sticky which can be a bit of a pain depending on what sort of piping I'm doing.
Quote by @%username% on %date%
%body%