long term storage?

Does anyone know of a decent long-term storage facility not too far from no. VA? Preferrably climate controlled and a company that at least starts the vehicle monthly. I am going overseas for 3 years and need to store my '66 Dart and possibly another vehicle.

This is an add from the DC Craigslist. I'm not familiar with them, just thought that I'd pass it along.

http://washingtondc.craigslist.org/nva/prk/1343196394.html

Thanks a lot, I think this is what I'm looking for!