Seven Springs is a great nearby resort-about 3 1/2 hours from Rockville. I've got a group going from 12/23 to 12/28 and can include some more people at the group rates. You don't have to go the whole time. 2 night minimum is $192 per adult for 2 night for room/lifts/2 breakfast/1 dinner. Extra nights aditional. Kids are less.
You can email me at immlaw@erols.com or call 301 649-8030