If you're reasonably close to Western Fairfax, please consider donating the clothing to ShareHouse. It's a completely free service run by volunteers that accepts gently-used clothing and shoes. Once a month, volunteers meet to set up tables, sort the clothing, and then anyone in need is allowed to come and take up to two bags of clothes/shoes for no charge. Most items are accepted and the bins are empty by the end of the day, but if for some reason there are leftover items, they are either saved for the next month (for example, if it's Summer clothing that's received in Wintertime, it's not likely to be taken during Winter months, so it's kept in their storage until Summer and then put back out), or donated to another thrift shop. Here's info about where their drop box is located:
http://www.pleasantvalleyumc.net/sharehouse/